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Alloy Steel and the Early CV Era

[Bonney CV Advertisement from Catalog]
Fig. 29. Bonney CV Advertisement from Catalog, ca. 1927.

The development of alloy steel tools in the early 20th century was arguably one of the century's two most important advances in toolmaking, the other being the development of interchangeable sockets. Bonney was at the forefront of this development, as they worked not only at improving the alloys and toolmaking techniques, but also developed new types of tools made possible by the stronger steel.

One of the alloys widely favored for tool production was a chrome-vanadium alloy steel. This was Bonney's choice for their early alloy tools, and for their trademark as well. Bonney filed trademark registrations for "CV" and a decal with "CV Chrome-Vanadium" with the first use dates in November of 1922. A later trademark for the well-known CV-Circle logo was filed in 1925.

[1922 Notice for Bonney CV Wrenches]
1922 Notice for Bonney CV Wrenches. [External Link]

The notice at the near left appeared in the November 30, 1922 issue of Motor Age and provides information on the new Bonney CV tappet wrenches. It notes the use of heat-treated chrome vanadium steel. This is believed to be one of the first public announcements of the new wrench line.

Bonney advertised its new wrenches extensively in both trade publications and popular magazines. An advertisement in the June 1924 issue of Popular Science on page 107 shows a kit of six Bonney C.V. wrenches in a roll-up kit, available for $5.85 postpaid.

A similar advertisement in the following July 1924 issue of Popular Science on page 91 shows the same kit of six C.V. wrenches, but with a full illustration of the wrenches. The text explains the superiority of the chrome-vanadium alloy steel, claiming it to be four times stronger than standard steel.

Fig. 29 at the far left shows the Bonney advertisement for CV Chrome-Vanadium tools, as it appeared on the cover of a catalog dating to around 1927. The scroll in the center shows the famous Bonney claim for the superior strength of their new CV tools.

[Bonney CV Decal]
Fig. 30. Bonney CV Decal from 1731-A Wrench, 1923.

Fig. 30 shows a close-up of the Bonney decal applied to every tool in the C-V product line. This particular decal is from a Bonney 1731-A wrench manufactured in 1923.

In the remainder of this section we'll show examples of Bonney's early CV tools, all made within the 1922 to 1925 time frame. (The actual selection criterion is the presence of a forged-in B-Shield mark.)


Early Open-End Wrenches


Early 1725-B CV 1/2x9/16 Open-End Wrenches

The next several figures show early examples of the 1725-B model, one of the more popular sizes.

[Bonney Early 1725-B CV 1/2x9/16 Open-End Wrench]
Fig. 31. Bonney Early 1725-B CV 1/2x9/16 Open-End Wrench, with Insets for Reverse and Side View, 1923.

Fig. 31 shows an early Bonney 1725-B 1/2x9/16 open-end wrench, stamped with the Bonney name and embedded shield on the face. The shank is marked with "Made in U.S.A." and the B-Shield logo forged into the front, with "Chrome-Vanadium" forged into the reverse, but without the usual CV-Circle logo. The reverse shank also has a forged-in code "EO" visible at the left.

The overall length is 5.5 inches, and the finish is nickel plating, with some losses due to wear.

The reverse faces are marked "5/16 S.A.E. 5/16 [HEX]C" and "3/8 S.A.E. 3/8 [HEX]C", references to the older S.A.E. and Hex Capscrew size conventions.

The top inset shows a side view of the wrench, and some flash left by the trimming operation can be seen on left end.

The presence of the forged-in B-Shield logo on this example indicates relatively early production, and the lack of the CV-Circle logo places the production in 1923 or earlier. The expected early production date is confirmed by the date code, with the year code "O" and embedded shield marking indicating production in 1923.

As a side note, this wrench is a fine example of early Bonney production, and also demonstrates that historically interesting tools need not be costly. This wrench was found in the $0.25 bargain bin of a local used tool emporium, needing only minor clean-up before being displayed here.


[Bonney 1725-B CV 1/2x9/16 Open-End Wrench]
Fig. 32. Bonney 1725-B CV 1/2x9/16 Open-End Wrench, with Inset for Reverse, 1924.

Fig. 32 shows another early Bonney 1725-B 1/2x9/16 open-end wrench, stamped with the Bonney name and embedded shield on the face, and with "Made in U.S.A." and the B-Shield logo forged into the shank. The reverse shank has forged-in markings "Chrome-Vanadium" with the CV-Circle logo. The shank also has a forged-in code "JP" visible at the left.

The overall length is 5.5 inches. The original finish was probably nickel plating, but the plating has been lost completely due to extensive rust.

The reverse faces are stamped "5/16 S.A.E. 5/16 [HEX]C" and "3/8 S.A.E. 3/8 [HEX]C", references to the earlier size conventions.

The year code "P" and B-Shield logo indicate production in 1924.

[Bonney 1725-B CV 1/2x9/16 Open-End Wrench]
Fig. 33. Bonney 1725-B CV 1/2x9/16 Open-End Wrench, with Inset for Reverse, 1925.

Fig. 33 shows another slightly later (but still early) Bonney 1725-B open-end wrench, stamped with the Bonney name and embedded shield on the face, and with "Made in U.S.A." and the B-Shield logo forged into the shank. The reverse shank has forged-in markings "Chrome-Vanadium" with the CV-Circle logo. The shank also has a forged-in code "CQ" visible at the left.

The overall length is 5.5 inches. The finish is nickel plating, with losses due to wear and rust.

The reverse faces are stamped "1/4 U.S.S. 5/16 [HEX]C" and "3/8 S.A.E. 3/8 [HEX]C", references to the earlier size conventions.

The year code "Q" and B-Shield logo indicate production in 1925.


Early 1025 CV 1/2x19/32 Open-End Wrench

[Bonney 1025 CV 1/2x19/32 Open-End Wrench]
Fig. 34. Bonney 1025 CV 1/2x19/32 Open-End Wrench, with Inset for Reverse Detail, 1924.

Fig. 34 shows an early Bonney 1025 1/2x19/32 open-end wrench, stamped with the Bonney name and embedded shield on the face, and with "Made in U.S.A." and the B-Shield logo forged into the shank. The reverse shank has forged-in markings "Chrome-Vanadium" with the CV-Circle logo. The shank also has a forged-in code "JP" visible at the left.

The overall length is 5.5 inches, and the finish is nickel plating with polished faces.

The reverse faces are stamped "1/4 U.S.S. 5/16 [HEX]C" and "5/16 U.S.S.", references to the earlier U.S.S. and Hex Capscrew size conventions.

The year code "P" and B-shield logo indicate production in 1924.


Early 1027-C CV 9/16x11/16 Open-End Wrench

[Bonney Early 1027-C CV 9/16x11/16 Open-End Wrench]
Fig. 35. Bonney Early 1027-C CV 9/16x11/16 Open-End Wrench, with Insets for Reverse and Side View, 1923.

Fig. 35 shows an early Bonney 1027-C 9/16x11/16 open-end wrench, stamped with the Bonney name and embedded shield on the face. The shank has forged-in markings "Made in USA" with the B-Shield logo at the right, with a forged-in code "FO" visible at the left. The reverse is marked with "Chrome-Vanadium" forged into the shank, but without the usual CV-Circle logo.

The overall length is 6.5 inches. The original finish was nickel plating, and a few traces are visible on the faces and shank.

The reverse faces are stamped with the sizes as "3/8 S.A.E. 3/8 [HEX]C" and "3/8 U.S.S.", references to the older size conventions.

The top inset shows a side view of the wrench, and some marks from the trimming operation can be seen on the edge.

The presence of the forged-in B-Shield logo on this example indicates relatively early production, and the lack of the CV-Circle logo places the production in 1923 or earlier. The expected early production date is confirmed by the date code, with the year code "O" and embedded shield marking indicating production in 1923.


Early 1027 CV 19/32x11/16 Open-End Wrench

[Bonney 1027 CV 19/32x11/16 Open-End Wrench]
Fig. 36. Bonney 1027 CV 19/32x11/16 Open-End Wrench, with Inset for Reverse Detail, 1924.

Fig. 36 shows an early Bonney 1027 19/32x11/16 wrench, stamped with the Bonney name and embedded shield on the face, and with "Made in U.S.A." and the B-Shield logo forged into the shank. The reverse shank has forged-in markings "Chrome-Vanadium" with the CV-Circle logo. The shank also has a forged-in code "HP" visible at the left.

The overall length is 6.5 inches, and the finish is nickel plating.

The reverse faces are stamped "5/16 U.S.S." and "3/8 U.S.S.", references to the older size convention.

The "P" year code and B-Shield logo indicate production in 1924.


Early 1028 CV 19/32x25/32 Open-End Wrench

[Bonney 1028 CV 19/32x25/32 Open-End Wrench]
Fig. 37. Bonney 1028 CV 19/32x25/32 Open-End Wrench, with Inset for Reverse, 1922.

Fig. 37 shows an early Bonney 1028 19/32x25/32 open-end wrench, marked with "Made in U.S.A." and the B-Shield logo forged into the shank, with "Chrome-Vanadium" forged into the reverse, but without the usual CV-Circle logo. The right front face is stamped with the Bonney name and embedded shield, and the reverse faces are stamped "5/16 U.S.S" and "7/16 U.S.S.", references to the older U.S.S. size convention. The shank is also marked with a forged-in code "IN" visible at the left.

The overall length is 7.4 inches, and the finish is plain steel, with pitting due to rust.

The "N" year code and B-Shield forge mark indicate production in 1922. The "IN" date code on this wrench, corresponding to September of 1922, is the earliest code observed on a Bonney CV wrench. (We have several more examples to be added.)


Early 1729 CV 5/8x3/4 Open-End Wrench

[Bonney 1028-S CV 5/8x25/32 Open-End Wrench]
Fig. 38A. Bonney 1729 CV 5/8x3/4 Open-End Wrench, with Inset for Reverse, 1922.

Fig. 38A shows an early Bonney 1729 5/8x3/4 open-end wrench, marked with "Made in USA" and the B-Shield logo forged into the front, with "Chrome-Vanadium" forged into the reverse, but without the usual CV-Circle logo. The right front face is stamped with the Bonney name and embedded shield, and the reverse faces are stamped "7/16 S.A.E 7/16 [HEX]C" and "1/2 S.A.E. 1/2 [HEX]C", references to the older S.A.E. and Hex Capscrew size conventions. The shank also has a forged-in code "IN" visible at the left.

The overall length is 7.4 inches, and the finish is nickel plating with polished faces.

The "N" year code and B-Shield forge mark indicate production in 1922. The "IN" date code on this wrench, corresponding to September of 1922, is the earliest code observed on a Bonney CV wrench. (We have several more examples to be added.)


Early 1028-S CV 5/8x25/32 Open-End Wrenches

[Bonney 1028-S CV 5/8x25/32 Open-End Wrench]
Fig. 38B. Bonney 1028-S CV 5/8x25/32 Open-End Wrench, with Inset for Reverse, 1924.

Fig. 38B shows an early Bonney 1028-S 5/8x25/32 open-end wrench with its Bonney C-V decal. The shank is marked with "Made in U.S.A." and the B-Shield logo forged into the front, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse. The right front face is stamped with the Bonney name and embedded shield, and the reverse faces are stamped "7/16 S.A.E 7/16 [HEX]C" and "7/16 U.S.S.", references to the older U.S.S., S.A.E. and Hex Capscrew size conventions. The shank also has a forged-in code "HP" visible at the left.

The overall length is 7.5 inches, and the finish is nickel plating with polished faces.

The "P" year code and embedded shield marking indicate production in 1924.

This wrench was acquired as part of a Bonney No. 25 wrench set in a leatherette roll, with most of the wrenches in nearly unused condition.


Early 1731-A CV 3/4x7/8 Open-End Wrenches

The next three figures show early examples of the Bonney CV 1731-A wrench.

[Bonney Early 1731-A CV 3/4x7/8 Open-End Wrench]
Fig. 39. Bonney Early 1731-A CV 3/4x7/8 Open-End Wrench, with Insets for Side and Reverse, 1922.

Fig. 39 shows an early Bonney 1731-A 3/4x7/8 open-end wrench, stamped with the Bonney name and embedded shield on the face. The shank has forged-in markings "Made in USA" with the B-Shield logo at the right, with a forged-in code "IN" visible at the left. and shown as a close-up in the middle inset. The reverse is marked with "Chrome-Vanadium" forged into the shank, but without the usual CV-Circle logo.

The overall length is 8.5 inches. The finish is nickel plating with minor losses due to wear.

The reverse faces are marked with the sizes as "1/2 S.A.E. 1/2 [HEX]C" and "9/16 S.A.E. 5/8 [HEX]C", references to the older S.A.E and Hex Capscrew size conventions.

The "N" year code and B-Shield forge mark indicate production in 1922. The "IN" date code on this wrench, corresponding to September of 1922, is the earliest code observed on a Bonney CV wrench. (We have several more examples to be added.)

[Bonney 1731-A Early CV 3/4x7/8 Open-End Wrench]
Fig. 40. Bonney 1731-A Early CV 3/4x7/8 Open-End Wrench, with Insets for Side and Reverse, 1923.

Fig. 40 shows another early Bonney 1731-A 3/4x7/8 open-end wrench with its CV decal in good condition. The shank is marked with "Made in USA" and the B-Shield logo forged into the front, with "Chrome-Vanadium" forged into the reverse, but without the usual CV-Circle logo. The right front face is stamped with the Bonney name and embedded shield, and the reverse faces are marked with the sizes as "1/2 S.A.E. 1/2 [HEX]C" and "9/16 S.A.E. 5/8 [HEX]C", references to the older S.A.E. and Hex Capscrew size conventions. The shank also has a forged-in code "JO" visible at the left.

The overall length is 8.5 inches, and the finish is nickel plating with highly polished faces.

The "O" year code and B-Shield logo indicate production in 1923.

The wrench was acquired as part of a Bonney No. 25 wrench set in a leatherette roll, with most of the wrenches in nearly unused condition.


[Bonney 1731-A Early CV 3/4x7/8 Open-End Wrench]
Fig. 41. Bonney 1731-A Early CV 3/4x7/8 Open-End Wrench, with Insets for Side and Reverse, 1923.

Fig. 41 shows another early example of the Bonney 1731-A open-end wrench, stamped with the Bonney name and embedded shield on the face. The shank has forged-in markings "Made in USA" with the B-Shield logo at the right, with a forged-in code "JO" visible at the left. The reverse is marked with "Chrome-Vanadium" forged into the shank, but without the usual CV-Circle logo.

The overall length is 8.5 inches. The original finish was nickel plating, and a few traces are visible on the faces and shank.

The reverse faces are marked with the sizes as "1/2 S.A.E. 1/2 [HEX]C" and "9/16 S.A.E. 5/8 [HEX]C", references to the older S.A.E and Hex Capscrew size conventions.

The "O" year code and B-Shield logo indicate production in 1923.


Early 1733 CV 7/8x1 Open-End Wrench

[Bonney 1733 CV 7/8x1 Open-End Wrench]
Fig. 42. Bonney 1733 CV 7/8x1 Open-End Wrench, with Inset for Reverse, 1923.

Fig. 42 shows an early Bonney 1733 7/8x1 open-end wrench, stamped with the Bonney name and embedded shield on the face. The shank is marked with "Made in U.S.A." and the B-Shield logo forged into the front, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse. The shank also has a forged-in code "GO" visible at the left.

The overall length is 9.5 inches. The original finish was likely nickel plating, but most has been lost due to wear.

The reverse faces are marked "1/2 U.S.S. 5/8 [HEX]C" and "3/4 [HEX]C", references to the older U.S.S. and Hex Capscrew size conventions.

The "O" year code and B-Shield logo indicate production in 1923. The presence of the CV-Circle logo on this early example is unusual, and might be considered as an experiment.


Early 1033-C CV 15/16x1 Inch Open-End Wrenches

[Early Bonney 1033-C CV 15/16x1 Open-End Wrench]
Fig. 43. Early Bonney 1033-C CV 15/16x1 Open-End Wrench, with Insets for Reverse and Marking Detail, 1923.

Fig. 43 shows an early Bonney 1033-C CV 15/16x1 open-end wrench with its CV decal in nearly pristine condition. The wrench is marked with "Made in U.S.A." and the B-Shield logo forged into the shank, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse. The right front face is stamped with the Bonney name and embedded shield, and the reverse faces are stamped "5/8 S.A.E." and "11/16 S.A.E. 3/4 [HEX]C", references to the older S.A.E. and Hex Capscrew size conventions. The shank also has a forged-in code "G-O" visible to the left of the decal.

The overall length is 9.4 inches, and the finish is nickel plating with polished faces.

The "O" year code and B-Shield logo indicate production in 1923. The presence of the CV-Circle logo on this early example is unusual, and might be considered as an experiment.

The wrench was acquired as part of a Bonney No. 25 wrench set in a leatherette roll, with most of the wrenches in nearly unused condition.


[Bonney 1033-C CV 15/16x1 Open-End Wrench]
Fig. 44. Bonney 1033-C CV 15/16x1 Open-End Wrench, with Inset for Reverse, 1925.

Fig. 44 shows another early Bonney 1033-C 15/16x1 open-end wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face. The shank has forged-in markings "Made in USA" with the B-Shield logo on the front, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse. A forged-in code "AQ" also appears on the shank at the left.

The overall length is 9.4 inches. and the finish is nickel plating.

The opening sizes are stamped on the reverse faces as "5/8 S.A.E." and "11/16 S.A.E. 3/4 [HEX]C", references to the older S.A.E. and Hex Capscrew conventions.


Early 1035 CV 31/32/1-1/16 Open-End Wrench

[Bonney 1035 CV 31/32x1-1/16 Open-End Wrench]
Fig. 45. Bonney 1035 CV 31/32x1-1/16 Open-End Wrench, with Inset for Reverse Detail, ca. 1925.

Fig. 45 shows an early Bonney 1035 31/32x1-1/16 open-end wrench, stamped with the Bonney name and embedded shield on the face. The shank has forged-in markings "Made in USA" with the B-Shield logo on the front, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse. A forged-in code "AQ" also appears on the shank at the left.

The overall length is 10.5 inches. The original finish was probably nickel plating, but has been lost due to rust.

The reverse faces are stamped "9/16 U.S.S." and "5/8 U.S.S.", references to the older size convention.


Early Tappet Wrenches

Tappet wrenches were among Bonney's earliest alloy-steel tools and were in production by late 1922, based on catalog sources and an observed example.


Early 402 1/2x1/2 Tappet Wrench

[Bonney 402 CV 1/2x1/2 Tappet Wrench]
Fig. 46. Bonney 402 CV 1/2x1/2 Tappet Wrench, with Inset for Reverse Detail, ca. 1925.

Fig. 46 shows an early Bonney 402 1/2x1/2 tappet wrench, stamped with the Bonney name and embedded shield on the face. The shank is marked with "Made in USA" and the B-Shield logo plus a "DQ" code on the front, with "Chrome-Vanadium" and the CV-Circle logo on the reverse.

The overall length is 8.0 inches. The original finish appears to have been nickel plating, though most has been lost due to wear.


Early 403 9/16x9/16 Tappet Wrench

[Bonney 403 CV 9/16x9/16 Tappet Wrench]
Fig. 47. Bonney 403 CV 9/16x9/16 Tappet Wrench, with Inset for Reverse, 1924.

Fig. 47 shows an early Bonney 403 9/16x9/16 tappet wrench, marked with "Made in U.S.A." and the B-Shield logo forged into the shank, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse. The left front face is stamped with the Bonney name and embedded shield, and the reverse faces are stamped with the fractional size. The shank also has a forged-in code "EP" visible at the right.

The overall length is 8.0 inches. The finish is nickel plating, with some loss due to wear.

The "P" year code and B-Shield forge mark indicate production in 1924.


Early 403A 19/32x19/32 Tappet Wrench

[Bonney 403A CV 19/32x19/32 Tappet Wrench]
Fig. 48. Bonney 403A CV 19/32x19/32 Tappet Wrench, with Inset for Reverse, 1922.

Fig. 48 shows an early Bonney 403A 19/32x19/32 tappet wrench, marked with "Made in U.S.A." and the B-Shield logo forged into the shank, with "Chrome-Vanadium" forged into the reverse (bottom image). The left front face is stamped with the Bonney name and embedded shield, and the reverse faces are stamped with the fractional size. The reverse shank also has a forged-in code "LN" visible at the right.

The overall length is 8.0 inches, and the finish is nickel plating.

The "N" year code and B-Shield forge mark indicate production in 1922. This wrench is our earliest example of a Bonney tappet wrench.


Early Waterpump Wrenches

In the early 1920s Bonney developed a line of thin single-open wrenches intended for waterpump packing nut service, similar to the Nash Waterpump Wrench shown in another figure. These wrenches were designed with a 30 degree head offset and short handles, making them effective for work in confined places. The waterpump wrenches were offered in a 12xx model series, with sizes ranging from 1230 (15/16) up to 1272 (2-1/4). (Additional sizes were offered later.)


Early 1246 CV Waterpump Wrench

[Bonney CV 1246 1-7/16 Waterpump Wrench]
Fig. 49. Bonney CV 1246 1-7/16 Waterpump Wrench, with Inset for Reverse Detail, 1924.

Fig. 49 shows an early Bonney 1246 1-7/16 waterpump wrench, stamped with the Bonney name and embedded shield on the face. The shank is marked with "Made in U.S.A." and the B-Shield logo forged into the front, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse. The shank also has a forged-in code "FP" visible at the right.

The overall length is 7.7 inches, and the finish is nickel plating.

The "P" year code and B-Shield forge mark indicate production in 1924.


Early 1272 CV Waterpump Wrench

[Bonney CV 1272 2-1/4 Waterpump Wrench]
Fig. 50. Bonney CV 1272 2-1/4 Waterpump Wrench, with Insets for Reverse Detail and Marking Detail, 1924.

Fig. 50 shows an early Bonney 1272 2-1/4 waterpump wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face. The shank has forged-in markings "Made in U.S.A." with the B-Shield logo on the front, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 8.6 inches. The original finish was nickel plating, and some traces remain on the face and shank.

The shank also has a forged-in code "FP." visible at the right, with a close-up shown in the right inset. The year code has been damaged by wear or corrosion and is difficult to read, but the outline of the "P" can be seen in the close-up view. The "P" year code and B-Shield forge mark indicate production in 1924.


Early Specialty Wrenches


Early SE-125 Waterpump Wrench

[Bonney SE-125 Nash Waterpump Wrench]
Fig. 51. Bonney SE-125 Nash Waterpump Wrench, with Inset for Reverse, ca. 1923.

Fig. 51 shows an early Bonney specialty wrench, the SE-125 Nash waterpump wrench. The shank has forged-in markings "Nash Water Pump Nut SE-125", with the B-Shield logo and "Chrome-Vanadium" on the reverse. A forged-in code "JO" also appears on the reverse shank (not shown).

The overall length is 8.5 inches, and the finish is nickel plating, with some loss due to rust and wear.

The wrench has an unusual stepped opening, apparently required for its intended application.

An important detail to note with this example is that the "Chrome-Vanadium" marking is paired with the older B-Shield logo, rather than the usual CV-Circle logo. The CV-Circle logo was already being used in advertisements by 1923, and was registered (with "Chrome-Vanadium") as a trademark in 1925. Most of the early Bonney CV wrenches are marked with the CV-circle logo, and the absence of the mark here likely indicates an early production date.


Early 1407A CV 7/16 Single-Open Wrench

[Bonney 1407A 7/16 Single-Open Wrench]
Fig. 52. Bonney 1407A 7/16 Single-Open Wrench, with Inset for Reverse Detail, ca. 1923-1925.

Fig. 52 shows another early chrome-vanadium wrench, a Bonney 1407A 7/16 single-open wrench with the model number stamped (faintly) on the shank. The shank is marked "Made in U.S.A" with the B-Shield logo in forged raised letters, with "Chrome-Vanadium" on the reverse.

The overall length is 6.0 inches, and the finish is black paint.


Early CV 8924B Specialty Wrench

[Bonney 8924B CV Specialty Wrench]
Fig. 53. Bonney 8924B CV Specialty Wrench, with Inset for Reverse Detail.

Fig. 53 shows an early Bonney model 8924B specialty wrench, built with two drive tangs on arms spanning a 2-5/16 diameter semicircle. The shank has both forged-in and stamped markings, with "Made in U.S.A." and the B-Shield logo forged on one side, and "Chrome-Vanadium" with the CV-Circle logo forged into the reverse. The Bonney name and embedded shield with "Made in U.S.A" is also stamped on the front.

The overall length is 11.3 inches, and the finish is chrome plating.

The application for this wrench is not yet known.


Early CV Box and Open-End Specialty Wrench

[Bonney CV Box and Open-End Specialty Wrench]
Fig. 54. Bonney CV Box and Open-End Specialty Wrench, with Insets for Reverse and Marking Detail, 1924.

Fig. 54 shows an early Bonney CV specialty wrench combining a 2-1/4 box end with a 31/32 open end. The shank is marked with "Made in U.S.A." and the B-Shield logo forged into the front, with "Chrome-Vanadium" with the CV-Circle logo forged into the reverse. The shank also has a forged-in "CP" date code visible at the left, shown as a close-up in the middle inset. The open end is stamped with the Bonney name and embedded shield on the front, with "9/16 U.S.S." on the reverse.

The overall length is 12.1 inches, and the finish is chrome plating.

The "P" year code and embedded shield marking indicate production in 1924.

Currently we don't have a catalog reference for this tool and so are unsure of its application, although the large box opening is probably for a hub nut. The shank appears to have a partially legible model number forged in, with the last two digits resembling "39" or "89".


Early 1507A CV 7/8 Single-Open Wrench

[Bonney 1507A CV 7/8 Single-Open Wrench]
Fig. 55. Bonney 1507A CV 7/8 Single-Open Wrench, with Inset for Reverse Detail, 1924.

Fig. 55 shows an early Bonney 1507A 7/8 single-open wrench, marked with the B-Shield logo and "Made in U.S.A" forged into the shank, with "Chrome-Vanadium" and the CV-Circle logo on the reverse. The face is stamped with the Bonney name and embedded shield, with the fractional size on the reverse face.

The overall length is 12.0 inches. The original finish was nickel plating, but most has been lost due to rust.

The reverse shank has a faint forged-in code "DP" (not shown), and the "P" year code and embedded shield indicate production in 1924.

The specific application for this wrench is not yet known, but it may be an early version of the Bonney 2535 Dodge Brake Wrench shown in a later figure.


CV Chrome-Vanadium Tools

After the introduction to the early CV tools in the previous section, in this section we'll explore the later development of the highly successful CV line.


Open-End Wrenches

Bonney offered a wide selection of open-end wrenches in its Chrome-Vanadium product line. These wrenches were given model numbers in a 1xxx series derived by adding 1000 to the industry-standard number for a given size.


1020 CV 1/4x5/16 Open-End Wrench

[Bonney 1020 CV 1/4x5/16 Open-End Wrench]
Fig. 56. Bonney 1020 CV 1/4x5/16 Open-End Wrench, with Inset for Reverse Detail, 1940.

Fig. 56 shows the smallest of the Bonney's standard open-end models, a Bonney 1020 1/4x5/16 open-end wrench, stamped "Made in U.S.A." on the face. The shank has a forged-in code "LR." visible at the left, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 3.0 inches, and the finish is chrome plating with polished faces.

The year code "R" and plain Bonney name indicate production in 1940.


1723 CV 3/8x7/16 Open-End Wrenches

The next several figures show examples of Bonney CV 1723 wrenches.

[Bonney 1723 CV 3/8x7/16 Open-End Wrench]
Fig. 57. Bonney 1723 CV 3/8x7/16 Open-End Wrench, with Inset for Reverse, 1925.

Fig. 57 shows a Bonney 1723 3/8x7/16 open-end wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face, and with "Chrome-Vanadium" and the CV-Circle logo forged into the shank on the reverse. The shank also has a forged-in code "HQ." visible at the left.

The overall length is 4.5 inches. The finish is plain steel with traces of the original nickel plating.

The reverse faces are marked "3/16 CAP" and "1/4 S.A.E. 1/4 CAP", references to the older Hex Capscrew and S.A.E. size conventions.

The year code "Q" and embedded shield marking indicate production in 1925.

[Bonney 1723 CV 3/8x7/16 Open-End Wrench]
Fig. 58. Bonney 1723 CV 3/8x7/16 Open-End Wrench, with Inset for Reverse, 1926.

Fig. 58 shows a Bonney 1723 3/8x7/16 open-end wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face, and with "Chrome-Vanadium" and the CV-Circle logo forged into the shank on the reverse. The shank also has a forged-in code "CR" visible at the left.

The overall length is 4.5 inches. The finish is plain steel with traces of the original nickel plating.

The reverse faces are marked "3/16 CAP" and "1/4 S.A.E. 1/4 CAP", references to the older Hex Capscrew and S.A.E. size conventions.

The year code "R" and embedded shield marking indicate production in 1926.

[Bonney 1723 CV 3/8x7/16 Open-End Wrench]
Fig. 59. Bonney 1723 CV 3/8x7/16 Open-End Wrench, with Inset for Reverse, 1927.

The next two figures show examples of Bonney CV 1723 wrenches, both produced in the same year but with some differences in construction and marking.

Fig. 59 shows a Bonney 1723 3/8x7/16 open-end wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face, and with "Chrome-Vanadium" and the CV-Circle logo forged into the shank on the reverse. The shank also has a forged-in code "DS" visible at the left.

The overall length is 4.4 inches, and the finish is nickel plating.

The reverse faces are marked "3/16 CAP" and "1/4 S.A.E. 1/4 CAP", references to the older Hex Capscrew and S.A.E. size conventions.

The year code "S" and embedded shield marking indicate production in 1927.

[Bonney 1723 CV 3/8x7/16 Open-End Wrench]
Fig. 60. Bonney 1723 CV 3/8x7/16 Open-End Wrench, with Inset for Reverse Detail, 1927.

Fig. 60 shows a slightly later Bonney 1723 3/8x7/16 open-end wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face, and with "Chrome-Vanadium" and the CV-Circle logo forged into the shank on the reverse. The shank also has a forged-in code "LS" visible at the left.

The overall length is 4.1 inches, and the finish is nickel plating.

The year code "S" and embedded shield marking indicate production in 1927.

A later version of the 1723 model can be seen as the Bonney 1723 Bonaloy Wrench.


1723-A CV 3/8x1/2 Open-End Wrench

[Bonney 1723-A CV 3/8x1/2 Open-End Wrench]
Fig. 61. Bonney 1723-A CV 3/8x1/2 Open-End Wrench, with Inset for Reverse Detail, 1927.

Fig. 61 shows a Bonney 1723-A 3/8x1/2 open-end wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face. The shank has a forged-in code "IS" visible at the left, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 4.4 inches, and the finish is nickel plating.

The year code "S" and embedded shield marking indicate production in 1927.


1725-B CV 1/2x9/16 Open-End Wrenches

The next two figures show examples of the Bonney CV 1725-B wrench.

[Bonney 1725-B CV 1/2x9/16 Open-End Wrench]
Fig. 62. Bonney 1725-B CV 1/2x9/16 Open-End Wrench, with Inset for Reverse Detail, 1928.

Fig. 62 shows a Bonney 1725-B 1/2x9/16 open-end wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face. The shank has a forged-in code "IT.." visible at the left, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 5.5 inches. The original finish was probably nickel plating, but the plating has been lost completely due to extensive rust.

The year code "T" and embedded shield marking indicate production in 1928.

[Bonney 1725B CV 1/2x9/16 Open-End Wrench]
Fig. 63. Bonney 1725B CV 1/2x9/16 Open-End Wrench, with Inset for Reverse Detail, 1937.

Fig. 63 shows a later Bonney 1725B 1/2x9/16 open-end wrench, stamped "Made in U.S.A." with the plain Bonney name on the face. The shank has a forged-in code "JO..v" visible at the left, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 5.5 inches, and the finish is chrome plating.

The year code "O" and plain Bonney name indicate production in 1937.


1025 CV 1/2x19/32 Open-End Wrench

[Bonney 1025 CV 1/2x19/32 Open-End Wrench]
Fig. 64. Bonney 1025 CV 1/2x19/32 Open-End Wrench, with Inset for Reverse Detail, 1941.

Fig. 64 shows a Bonney 1025 1/2x19/32 open-end wrench, stamped "Made in U.S.A." with the plain Bonney on the face. The shank has a forged-in code "DS." visible at the left, with "Chrome-Vanadium" and the CV-Circle logo forged into the shank on the reverse.

The overall length is 6.1 inches. The finish is chrome plating with polished faces, but with some pitting probably due to contact with a corrosive substance.

The "S" year code with the CV and plain Bonney name markings indicate production in 1941.


1727 CV 9/16x5/8 Open-End Wrenches

The next figures show two generations of the Bonney 1727 wrench.

[Bonney 1727 CV 9/16x5/8 Open-End Wrench]
Fig. 65. Bonney 1727 CV 9/16x5/8 Open-End Wrench, with Inset for Reverse, 1930.

Fig. 65 shows an earlier Bonney 1727 9/16x5/8 open-end wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face. The shank has a forged-in code "FV." visible at the left, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 6.5 inches. The original chrome plated finish has been lost due to extensive rust, leaving only a few traces.

The "V" year code and embedded shield marking indicate production in 1930.

[Bonney 1727 CV 9/16x5/8 Open-End Wrench]
Fig. 66. Bonney 1727 CV 9/16x5/8 Open-End Wrench, with Inset for Reverse, 1937.

Fig. 66 shows a somewhat later Bonney 1727 wrench, stamped "Made in U.S.A." with the plain Bonney name on the face. The shank has a forged-in code "BO..." visible at the left, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 6.5 inches. The finish is chrome plating, with some loss due to wear.

The "O" year code with the CV and plain Bonney name markings indicate production in 1937.


1027-C CV 9/16x11/16 Open-End Wrench

The next figures show several generations of the CV 1027C model.

[Bonney 1027-C CV 9/16x11/16 Open-End Wrench]
Fig. 67. Bonney 1027-C CV 9/16x11/16 Open-End Wrench, with Inset for Reverse Detail, 1926.

Fig. 67 shows an earlier Bonney 1027-C 9/16x11/16 open-end wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face. The shank has a forged-in code "ER.." visible at the left, with "Chrome-Vanadium" and the CV-Circle logo forged into the shank on the reverse.

The overall length is 6.5 inches.

The reverse faces are stamped "3/8 S.A.E. 3/8 CAP" and "3/8 U.S.S.", references to the older size conventions.

The year code "R" and embedded shield marking indicate production in 1926.

[Bonney 1027-C CV 9/16x11/16 Open-End Wrench]
Fig. 68. Bonney 1027-C CV 9/16x11/16 Open-End Wrench, with Inset for Reverse, 1928.

Fig. 68 shows a slightly later Bonney 1027-C 9/16x11/16 open-end wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face. The shank has a forged-in code "HT." visible at the left, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 6.5 inches, and the finish is chrome plating with polished faces.

The year code "T" and embedded shield marking indicate production in 1928.

[Bonney 1027-C CV 9/16x11/16 Open-End Wrench]
Fig. 69. Bonney 1027-C CV 9/16x11/16 Open-End Wrench, with Inset for Reverse Detail, 1941.

Fig. 69 shows a later Bonney 1027-C 9/16x11/16 open-end wrench, stamped "Made in U.S.A." with the plain Bonney name on the face. The shank has a forged-in code "LS..." visible at the left, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 7.3 inches, and the finish is chrome plating with polished faces.

The "S" year code and plain Bonney name indicate production in 1941.

An early version of the 1027C model can be seen as the Early Bonney CV 1027C Wrench, and a later version can be seen as the Bonney 1027C Bonaloy Wrench.


1027 CV 19/32x11/16 Open-End Wrenches

The next figures show two examples of the Bonney CV 1027 wrenches, with minor difference in markings.

[Bonney 1027 CV 19/32x11/16 Open-End Wrench]
Fig. 70. Bonney 1027 CV 19/32x11/16 Open-End Wrench, with Insets for Reverse Detail, ca. 1926-1929.

Fig. 70 shows a Bonney 1027 wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face. The reverse shank has forged-in markings "Chrome-Vanadium" with the CV-Circle logo.

The overall length is 6.5 inches, and the finish is nickel plating.

The reverse faces are stamped "5/16 U.S.S." and "3/8 U.S.S.", references to the older U.S.S. size convention.

[Bonney 1027 CV 19/32x11/16 Open-End Wrench]
Fig. 71. Bonney 1027 CV 19/32x11/16 Open-End Wrench, with Inset for Reverse Detail, 1928.

Fig. 71 shows a later version of the Bonney 1027 wrench model, with markings similar to the previous figure, but with the opening sizes expressed in fractional inches.

The shank has a forged-in code "CT" (not shown).

The "T" year code and embedded shield marking indicate production in 1928.


1729 CV 5/8x3/4 Open-End Wrench

[Bonney 1729 CV 5/8x3/4 Open-End Wrench]
Fig. 72. Bonney 1729 CV 5/8x3/4 Open-End Wrench, with Inset for Reverse Detail, 1928.

Fig. 72 shows a Bonney 1729 5/8x3/4 open-end wrench, marked "Made in U.S.A." with the Bonney name and embedded shield on the face, with "Chrome-Vanadium" and the CV-Circle logo forged into the shank on the reverse. The shank also has a forged-in code "JT." visible at the left.

The overall length is 7.5 inches, and the finish is nickel plating.

The "T" year code and embedded shield marking indicate production in 1928.


1028-S CV 5/8x25/32 Open-End Wrenches

[Bonney 1028-S CV 5/8x25/32 Open-End Wrench]
Fig. 73. Bonney 1028-S CV 5/8x25/32 Open-End Wrench, with Inset for Reverse Detail, 1929.

Fig. 73 shows a Bonney 1028-S 5/8x25/32 open-end wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face, with "Chrome-Vanadium" and the CV-Circle logo forged into the shank on the reverse. A forged-in code "AU" is visible on the shank at the left.

The overall length is 7.5 inches, and the finish is nickel plating with some loss due to rust.

The "U" year code and embedded shield marking indicate production in 1929.


1731-A CV 3/4x7/8 Open-End Wrench

[Bonney 1731-A CV 3/4x7/8 Open-End Wrench]
Fig. 74. Bonney 1731-A CV 3/4x7/8 Open-End Wrench, with Inset for Reverse Detail, 1928.

Fig. 74 shows a Bonney 1731-A 3/4x7/8 open-end wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face. The shank has a forged-in code "BT..." visible at the left, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 9.2 inches. The original finish has been lost due to rust and wear.

The year code "T" and embedded shield marking indicate production in 1928.

A very early example of this model can be seen as the Bonney Early 1731-A CV Wrench. A much later version of this model can be seen as the Bonney 1731-A Bonaloy Wrench.


1033-C CV 15/16x1 Open-End Wrenches

[Bonney 1033-C CV 15/16x1 Open-End Wrench]
Fig. 75. Bonney 1033-C CV 15/16x1 Open-End Wrench, with Inset for Reverse Detail, 1930.

Fig. 75 shows a Bonney 1033-C 15/16x1 open-end wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face. The shank has a forged-in code "CV" visible at the left, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 10.4 inches. The original finish was probably nickel or chrome plating, but has been lost due to rust.

The "V" year code and embedded shield marking indicate production in 1930.


[Bonney 1033-C CV 15/16x1 Open-End Wrench]
Fig. 76. Bonney 1033-C CV 15/16x1 Open-End Wrench, with Inset for Reverse Detail, ca. 1931-1932.

Fig. 76 shows another later Bonney 1033-C 15/16x1 open-end wrench, stamped "Made in U.S.A." with the plain Bonney name on the face. The shank has a forged-in code "CV...." visible at the left, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 10.4 inches, and the finish is plain steel with traces of the chrome plating.

Although this wrench has the same "V" year code as the previous figure, the date code is augmented with four dots, and the face is marked with the plain Bonney name. These marking features suggest a somewhat later manufacturing date, possibly in 1931 or 1932.


[Bonney 1033-C CV 15/16x1 Open-End Wrench]
Fig. 77. Bonney 1033-C CV 15/16x1 Open-End Wrench, with Inset for Reverse Detail, 1936.

Fig. 77 shows another later Bonney 1033-C open-end wrench, stamped "Made in U.S.A." with the plain Bonney name on the face. The shank has a forged-in code "IN..v" visible at the left, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 10.4 inches. The finish is chrome plating, with some loss due to wear and rust.

The "N" year code and plain Bonney name indicate production in 1936.

A very early example of the 1033-C model can be seen as the Bonney Early 1033-C CV Wrench.


1037 CV 1-1/16x1-1/4 Open-End Wrench

[Bonney 1037 CV 1-1/16x1-1/4 Open-End Wrench]
Fig. 78. Bonney 1037 CV 1-1/16x1-1/4 Open-End Wrench, with Inset for Reverse Detail, 1936.

Fig. 78 at the left shows a Bonney 1037 1-1/16x1-1/4 open-end wrench, stamped "Made in U.S.A." with the plain Bonney name on the face. The shank has a forged-in code "IN...v" visible at the left, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 11.9 inches. The original finish was chrome plating, and some traces of the finish can be seen on the faces.

The "N" year code with the CV and plain Bonney name markings indicate production in 1936.


1739A CV 1-1/4x1-1/2 Open-End Wrench

This next figure shows a fine example of one of Bonney's larger wrench sizes.

[Bonney 1739A CV 1-1/4x1-1/2 Open-End Wrench]
Fig. 79. Bonney 1739A CV 1-1/4x1-1/2 Open-End Wrench, with Insets for Reverse and Marking Detail, 1927.

Fig. 79 shows a Bonney 1037 1-1/16x1-1/4 open-end wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face. The shank has a forged-in code "DS........" visible at the left, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 14.0 inches. The original finish is nickel plating, with some losses due to wear.

The "S" year code and embedded shield marking indicate production in 1927.


Tappet Wrenches


402A 17/32x17/32 Tappet Wrench

[Bonney 402A CV 17/32x17/32 Tappet Wrench]
Fig. 80. Bonney 402A CV 17/32x17/32 Tappet Wrench, with Inset for Reverse Detail.

Fig. 80 shows a rarely-seen Bonney 402A 17/32x17/32 tappet wrench, marked "Made in U.S.A." with the Bonney name and embedded shield on the face. The shank has a forged-in code "LS" on the front, with "Chrome-Vanadium" and the CV-Circle logo on the reverse. The shank has a forged-in code "LS" at the right.

The overall length is 8.0 inches, and the finish is nickel plating.


403 9/16x9/16 Tappet Wrench

[Bonney 403 CV 9/16x9/16 Tappet Wrench]
Fig. 81. Bonney 403 CV 9/16x9/16 Tappet Wrench, with Inset for Reverse, 1929.

Fig. 81 shows a Bonney 403 9/16x9/16 tappet wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face. The shank has a forged-in code "FU.." at the right, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 8.0 inches. The finish is nickel plating, with some loss due to wear.

The "U" year code and embedded shield marking indicate production in 1929.

[Bonney 403 CV 9/16x9/16 Tappet Wrench]
Fig. 82. Bonney 403 CV 9/16x9/16 Tappet Wrench, with Inset for Reverse Detail, 1930.

Fig. 82 shows a Bonney 403 9/16x9/16 tappet wrench, marked "Made in U.S.A." with the Bonney name and embedded shield on the face. The shank has a forged-in code "DV" at the right, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 8.0 inches. The original finish has been lost due to rust.

The "V" year code and embedded shield marking indicate production in 1930.


404 5/8x5/8 Tappet Wrench

The next figures show two early examples of the Bonney CV 404 tappet wrench.

[Bonney 404 CV 5/8x5/8 Tappet Wrench]
Fig. 83. Bonney 404 CV 5/8x5/8 Tappet Wrench, with Inset for Reverse, 1925.

Fig. 83 shows a Bonney 404 5/8x5/8 tappet wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face. The shank has a forged-in code "LQ" at the right, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 8.0 inches. The original finish was nickel plating, but all has been lost due to rust and pitting, except for a few traces on one edge.

The "Q" year code and embedded shield marking indicate production in 1925, in the first cycle of Bonney's date code system.

[Bonney 404 CV 5/8x5/8 Tappet Wrench]
Fig. 84. Bonney 404 CV 5/8x5/8 Tappet Wrench, with Inset for Reverse Detail, 1926.

Fig. 84 shows a Bonney 404 5/8x5/8 tappet wrench, marked "Made in U.S.A." with the Bonney name and embedded shield on the face. The shank has a forged-in code "LR..." at the right, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 8.0 inches, and the finish is nickel plating with some loss due to rust.

The "R" year code and embedded shield marking indicate production in 1926, in the first cycle of Bonney's date code system.


405 11/16x11/16 Tappet Wrenches

The next two figures show examples of the Bonney 405 tappet wrench.

[Bonney 405 CV 11/16x11/16 Tappet Wrench]
Fig. 85. Bonney 405 CV 11/16x11/16 Tappet Wrench, with Inset for Detail, 1926.

Fig. 85 shows a Bonney 405 11/16x11/16 tappet wrench, marked "Made in U.S.A." with the Bonney name and embedded shield on the face. The shank has a forged-in code "LR.." on one side (not shown), with "Chrome-Vanadium" and the CV-Circle logo on the reverse.

The overall length is 8.0 inches, and the finish is nickel plating with some loss due to rust.

The year code "R" and embedded shield marking indicate production in 1926.

[Bonney 405 CV 11/16x11/16 Tappet Wrench]
Fig. 86. Bonney 405 CV 11/16x11/16 Tappet Wrench, with Inset for Reverse, 1928.

Fig. 86 shows another example of the Bonney 405 11/16x11/16 tappet wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face. The shank has a forged-in code "AT." visible at the right, with "Chrome-Vanadium" and the CV-Circle logo on the reverse.

The overall length is 8.0 inches. The finish is nickel plating, with minor losses due to rust.

The year code "T" and embedded shield marking indicate production in 1928.


1503 9/16 Long Tappet Wrench

[Bonney 1503 CV 9/16 Long Tappet Wrench]
Fig. 87. Bonney 1503 CV 9/16 Long Tappet Wrench, with Inset for Reverse Detail, 1929.

Fig. 87 shows a Bonney 1503 9/16 long tappet wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face. The shank has a forged-in code "BU" on the front, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 12.0 inches, and the finish is plain steel.

The year code "U" and embedded shield marking indicate production in 1929.


426 CV 3/4x7/8 Tappet Wrench

By 1930 Bonney had introduced a new series of tappet wrenches with different opening sizes on each end and symmetrical 15 degree offsets. The new tappet wrenches were given model numbers in a 42x series.

[Bonney 426 CV 3/4x7/8 Tappet Wrench]
Fig. 88. Bonney 426 CV 3/4x7/8 Tappet Wrench, with Inset for Detail, 1930

Fig. 88 shows a Bonney 426 3/4x7/8 tappet wrench, marked "Made in U.S.A." with the Bonney name and embedded shield on the face. The shank has a forged-in code "EV...." on the front, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 9.0 inches, and the finish is chrome plating with polished faces.

The year code "V" and embedded shield marking indicate production in 1930.


426A CV 13/16x7/8 Tappet Wrench

[Bonney 426A CV 13/16x7/8 Tappet Wrench]
Fig. 89. Bonney 426A CV 13/16x7/8 Tappet Wrench, with Inset for Reverse and Marking Detail, 1942

Fig. 89 shows a Bonney 426A 13/16x7/8 tappet wrench, stamped with "Made in U.S.A." and the plain Bonney name on the face. (The markings are difficult to read due to extensive pitting.) The shank has a forged-in code "ET." visible at the left, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 9.0 inches. The finish shows traces of chrome plating, but most has been lost due to extensive rust and pitting.

The year code "T" and plain Bonney name indicate production in 1942.

This wrench is significant in being one of the last CV-marked wrenches produced. Bonney suspended the CV marking during the 1942-1945 wartime production years, and post-war production switched to the "Bonaloy" marking.


Obstruction Wrenches

Obstruction wrenches are an interesting subtype of open-end wrenches, typically designed with large offset angles for work in cramped spaces. A number of companies experimented with different designs for obstruction wrenches, and several styles were popular during the 1920s and later. Bonney's design is notable for its use of openings on opposite sides of the shank.

Two of the alternate styles for obstruction wrenches can be seen in the Williams 2731-A Obstruction Wrench and Herbrand 1827 Obstruction Wrench.

Bonney's obstruction wrenches are believed to have been introduced in the mid to late 1920s. Currently our earliest catalog reference is a Bonney catalog sheet (binder insert) believed to be from around 1927. The catalog lists the wrenches in 27 models ranging from the 2722 (5/16x7/16) up to the 2731-B (13/16x7/8), and the description includes a "Patent Applied For" notice. (Despite a lengthy search, no patent for the Bonney wrenches has been found.)

The earlier examples of obstruction wrenches can be identified by the presence of a patent applied marking, or by the use of the older (U.S.S. or S.A.E.) size conventions for the opening sizes. Without regard for the Bonney date code, the presence of one or both of these older markings would give an a priori expected manufacturing date in the mid to late 1920s.

The examples below are presented in order of increasing size.


2723 CV 3/8x7/16 Obstruction Wrench

[Bonney 2723 CV 3/8x7/16 Obstruction Wrench]
Fig. 90. Bonney 2723 CV 3/8x7/16 Obstruction Wrench, with Inset for Reverse, 1927.

Fig. 90 shows a Bonney 2723 3/8x7/16 obstruction wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face. The shank has a forged-in code "JS" visible at the right, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 4.2 inches. The finish is nickel plating, with some loss due to wear and rust.

This wrench is not marked with the patent applied notice seen on some other examples, and the openings are marked with the across-flats sizes, rather than the older S.A.E. or U.S.S. bolt sizes.

The "S" year code and embedded shield marking indicate production in 1927.


2725B CV 1/2x9/16 Obstruction Wrench

[Bonney 2725B CV 1/2x9/16 Obstruction Wrench]
Fig. 91. Bonney 2725B CV 1/2x9/16 Obstruction Wrench, with Inset for Reverse, 1928.

Fig. 91 shows a Bonney 2725B 1/2x9/16 obstruction wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face. The shank has a forged-in code "FT" visible at the right, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 5.5 inches. The finish is nickel plating, with some loss due to wear and rust.

This wrench is not marked with the patent applied notice seen on some other examples, and the openings are marked with the across-flats sizes, rather than the older S.A.E. or U.S.S. bolt sizes.

The "T" year code and embedded shield marking indicate production in 1928.


2025 CV 1/2x19/32 Obstruction Wrench

[Bonney 2025 CV 1/2x19/32 Obstruction Wrench]
Fig. 92. Bonney 2025 CV 1/2x19/32 Obstruction Wrench, with Inset for Reverse, 1928.

Fig. 92 shows a Bonney 2025 1/2x19/32 obstruction wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on one face, with "Pat. App. For" and the model number on the other face. The shank has a forged-in code "DT." visible at the right, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 5.5 inches. The finish is nickel plating, with minor losses due to wear.

The reverse faces are stamped with the across-flats sizes of the openings, rather than the older S.A.E. or U.S.S. bolt sizes.

The "T" year code and embedded shield marking indicate production in 1928.

The patent applied notice indicates that a patent was filed for this design, but the corresponding patent (if issued) has not yet been found.


2727 CV 9/16x5/8 Obstruction Wrench

[Bonney 2727 CV 9/16x5/8 Obstruction Wrench]
Fig. 93. Bonney 2727 CV 9/16x5/8 Obstruction Wrench, with Inset for Reverse, 1927.

Fig. 93 shows an early Bonney 2727 9/16x5/8 obstruction wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on one face, with "Pat. App. For" and the model number on the other face. The shank is marked with a forged-in code "AS.." visible at the right, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 6.5 inches.

The reverse faces are stamped "3/8 S.A.E." and "7/16 S.A.E.", references to the older S.A.E. convention.

The "S" year code and embedded shield marking indicate production in 1927.

The patent applied notice indicates that a patent was filed for this design, but the corresponding patent (if issued) has not yet been found.


2027C CV 9/16x11/16 Obstruction Wrench

The next two figures show early examples of the 2027C wrench.

[Bonney 2027C CV 9/16x11/16 Obstruction Wrench]
Fig. 94. Bonney 2027C CV 9/16x11/16 Obstruction Wrench, with Inset for Reverse, 1926.

Fig. 94 shows an early Bonney 2027C 9/16x11/16 obstruction wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on one face, with "Pat. App. For" and the model number on the other face. The shank is marked with a forged-in code "IR" (or possibly "JR") at the right, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 6.5 inches. The finish is nickel plating with some loss due to wear.

The sizes are stamped on the faces as "3/8 S.A.E." and "3/8 U.S.S." for the older size conventions.

The "R" year code and embedded shield marking indicate production in 1926.

The patent applied notice indicates that a patent was filed for this design, but the corresponding patent (if issued) has not yet been found.

[Bonney 2027C CV 9/16x11/16 Obstruction Wrench]
Fig. 95. Bonney 2027C CV 9/16x11/16 Obstruction Wrench, with Inset for Reverse, 1927.

Fig. 95 shows an early Bonney 2027C 9/16x11/16 obstruction wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on one face, with "Pat. App. For" and the model number on the other face. The shank is marked with a forged-in code "JS" visible at the right, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 6.5 inches, and the finish is nickel plating, with some losses due to rust.

The "S" year code and embedded shield marking indicate production in 1927.

The patent applied notice indicates that a patent was filed for this design, but the corresponding patent (if issued) has not yet been found.


2028S CV 5/8x25/32 Obstruction Wrenches

The next two figures show early examples of the Bonney 2028S obstruction wrench, both made in 1927 but with differences in the size markings.

[Bonney 2028S CV 5/8x25/32 Obstruction Wrench]
Fig. 96. Bonney 2028S CV 5/8x25/32 Obstruction Wrench, with Inset for Reverse, 1927.

Fig. 96 shows an earlier Bonney 2028S 5/8x25/32 obstruction wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on one face, with "Pat. App. For" and the model number on the other face. The shank is marked with a forged-in code "BS" visible at the right, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 7.5 inches, and the finish is nickel plating, with some losses due to wear and rust.

The reverse faces are stamped with "7/16 U.S.S." and "7/16 S.A.E. 7/16 CAP", references to the older U.S.S., S.A.E., and Hex Capscrew size conventions.

The "S" year code and embedded shield marking indicate production in 1927.

[Bonney 2028S CV 5/8x25/32 Obstruction Wrench]
Fig. 97. Bonney 2028S CV 5/8x25/32 Obstruction Wrench, with Inset for Reverse, 1927.

Fig. 97 shows a slightly later Bonney 2028S 5/8x25/32 obstruction wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on one face, with "Pat. App. For" and the model number on the other face. The shank is marked with a forged-in code "FS." visible at the right, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 7.5 inches, and the finish is nickel plating, with some losses due to wear and rust.

The reverse faces are stamped with the across-flats sizes of the openings, rather than the older S.A.E. or U.S.S. bolt sizes.

The "S" year code and embedded shield marking indicate production in 1927.


2731-A CV 3/4x7/8 Obstruction Wrench

[Bonney 2731-A CV 3/4x7/8 Obstruction Wrench]
Fig. 98. Bonney 2731-A CV 3/4x7/8 Obstruction Wrench, with Insets for Reverse Detail, 1926.

Fig. 98 shows an early Bonney 2731-A 3/4x7/8 obstruction wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on one face, with "Pat. App. For" and the model number on the other face. The shank is marked with a forged-in code "LR" visible at the right, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 8.5 inches. The original finish has been lost except for a few traces of nickel plating.

The reverse faces are stamped "1/2 S.A.E. 1/2 CAP" and "1/2 U.S.S. 5/8 [HEX]C", references to the older size conventions.

The "R" year code and embedded shield marking indicate production in 1926.


2031 CV 25/32x7/8 Obstruction Wrench

[Bonney 2031 CV 25/32x7/8 Obstruction Wrench]
Fig. 99. Bonney 2031 CV 25/32x7/8 Obstruction Wrench, with Insets for Reverse Detail, 1927.

Fig. 99 shows an early Bonney 2031 25/32x7/8 obstruction wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on one face, with "Pat. App. For" and the model number on the other face. The shank is marked with a forged-in code "BS" visible at the right, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 8.5 inches, and the finish is nickel plating.

The reverse faces are stamped "1/2 U.S.S. 5/8 [HEX]C" and "7/16 U.S.S.", as shown in the upper left and lower right insets. These are references to the U.S.S. and Hex Capscrew size conventions corresponding to the 7/8 and 25/32 across-flats opening sizes.

The "S" year code and embedded shield marking indicate production in 1927.

The patent notice indicates that a patent was filed for this design, but the patent document has not been found yet.


Ignition Wrenches

In the late 1920s Bonney began offering a series of miniature wrenches for electrical and ignition work. These wrenches initially included models in the open-end and obstruction styles, and by 1936 miniature box wrenches had been added as well.

In the 1920s and early 1930s the ignition wrenches were part of the CV line, but with the introduction of Zenel steel in 1933 the ignition wrenches moved to the Zenel line.


H10 CV 3/16x7/32 Ignition Wrench

[Bonney H10 CV 3/16x7/32 Ignition Wrench]
Fig. 100. Bonney H10 CV 3/16x7/32 Ignition Wrench, with Inset for Reverse, 1941.

Fig. 100 shows the smallest of the Bonney wrenches, a dimunitive Bonney H10 3/16x7/32 ignition wrench, stamped "Made in U.S.A." with the plain Bonney name on the face. The shank has a forged-in code "BS" visible at the left, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 2.5 inches, and the finish is chrome plating.

The "S" year code and plain Bonney name indicate production in 1941.


H12 CV 1/4x9/32 Ignition Wrench

[Bonney H12 CV 1/4x9/32 Ignition Wrench]
Fig. 101. Bonney H12 CV 1/4x9/32 Ignition Wrench, with Inset for Reverse, ca. 1927-1932.

Fig. 101 shows a Bonney H12 1/4x9/32 ignition wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face. The reverse shank has forged-in markings "Chrome-Vanadium" with the CV-Circle logo, as seen in the inset.

The overall length is 3.0 inches, and the finish is chrome (or possibly nickel) plating.

This wrench was not marked with a forged-in code, but the embedded shield marking indicates production before 1933.


H18 CV 13/32x15/32 Ignition Wrench

[Bonney H18 CV 13/32x15/32 Ignition Wrench]
Fig. 102. Bonney H18 CV 13/32x15/32 Ignition Wrench, with Inset for Reverse, 1928.

Fig. 102 shows a Bonney H18 13/32x15/32 ignition wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face. The shank has a forged-in code "CT" visible at the left, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 4.1 inches. The finish is plain steel, slightly darkened due to rust.

The "T" year code and embedded shield marking indicate production in 1928.


Waterpump Wrenches

In the early 1920s Bonney developed a line of thin single-open wrenches intended for waterpump packing nut service, similar to the Nash Waterpump Wrench shown in an earlier figure. These wrenches were designed with a 30 degree head offset and short handles, making them effective for work in confined places. The waterpump wrenches were offered in a 12xx model series, with sizes ranging from 1230 (15/16) up to 1272 (2-1/4). (Additional sizes were offered later.)

Later on these wrenches proved to be highly useful for aircraft service, so much so that this style of wrench is sometimes called an "aircraft wrench".


1226 CV 13/16 Waterpump Wrench

[Bonney CV 1226 13/16 Waterpump Wrench]
Fig. 103. Bonney 1226 13/16 Waterpump Wrench, with Inset for Reverse Detail, 1936.

Fig. 103 shows a Bonney 1226 13/16 waterpump wrench, stamped "Made in U.S.A." with the plain Bonney name on the face. The shank has a forged-in code "BN..." visible at the right, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 6.5 inches. The finish is plain steel and some machining marks are visible on the face.

The "N" year code and plain Bonney name indicate production in 1936. Bonney's production in 1936 generally had chrome-plated finishes, suggesting that this item might have been a special-order.


1232 CV Waterpump Wrench

[Bonney CV 1232 1 Inch Waterpump Wrench]
Fig. 104. Bonney 1232 1 Inch Waterpump Wrench, with Inset for Reverse Detail, 1925.

Fig. 104 shows a Bonney 1232 1 inch waterpump wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield logo on the face. The shank has a forged-in code "KQ." at the right, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse shank (see inset).

The overall length is 6.9 inches. The finish is nickel plating with minor losses due to rust.

The "Q" year code and embedded shield marking indicate production in 1925.


1240 CV Waterpump Wrench

[Bonney CV 1240 1-1/4 Waterpump Wrench]
Fig. 105. Bonney 1240 1-1/4 Waterpump Wrench, with Inset for Reverse Detail.

Fig. 105 shows a Bonney 1240 1-1/4 waterpump wrench, stamped "Made in U.S.A." with the plain Bonney name on the face. The shank has a forged-in code "A?.v." at the right, unfortunately too worn to read, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 7.1 inches, and the finish is chrome plating with polished faces.


1242 CV 1-5/16 Waterpump Wrenches

The next figures show two generations of the Bonney CV 1242 waterpump wrench.

[Bonney CV 1242 1-5/16 Waterpump Wrench]
Fig. 106. Bonney 1242 1-5/16 Waterpump Wrench, with Inset for Reverse Detail, 1926.

Fig. 106 shows an earlier Bonney 1242 1-5/16 waterpump wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield logo on the face. The shank has a forged-in code "CR...." at the right (though worn and difficult to read), with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse (see inset).

The overall length is 7.7 inches. The original finish of the wrench was nickel plating, but most has been lost due to wear and rust.

The year code "R" and embedded shield marking indicate production in 1926.

[Bonney CV 1242 1-5/16 Waterpump Wrench]
Fig. 107. Bonney 1242 1-5/16 Waterpump Wrench, with Inset for Reverse Detail, 1942.

Fig. 107 shows a later Bonney 1242 1-5/16 waterpump wrench, stamped "Made in U.S.A." with the plain Bonney name on the face. The shank has a forged-in code "DT." at the right, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse (see inset).

The overall length is 7.6 inches, and the finish is chrome plating with polished faces.

The year code "T" and plain Bonney name indicate production in 1942.

This later wrench is significant in being one of the last CV-marked wrenches produced. Bonney suspended the CV marking during the 1942-1945 wartime production years, and post-war production switched to the "Bonaloy" marking.


1244 CV 1-3/8 Waterpump Wrench

[Bonney CV 1244 1-3/8 Waterpump Wrench]
Fig. 108. Bonney 1244 1-3/8 Waterpump Wrench, with Inset for Reverse Detail, 1926.

Fig. 108 shows a Bonney 1244 1-3/8 waterpump wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield logo on the face. The shank has a forged-in code "CR.." faintly visible at the right, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse (see inset).

The overall length is 7.7 inches. The finish is plain steel with extensive pitting due to rust.

The year code "R" and embedded shield marking indicate production in 1926.


1246 CV 1-7/16 Waterpump Wrench

[Bonney CV 1246 1-7/16 Waterpump Wrench]
Fig. 109. Bonney 1246 1-7/16 Waterpump Wrench, with Inset for Reverse Detail, 1940.

Fig. 109 shows a Bonney 1246 1-7/16 waterpump wrench, stamped "Made in U.S.A." with the plain Bonney name on the face. The shank has a forged-in code "IR." at the right, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse (see inset).

The overall length is 7.7 inches, and the finish is chrome plating with polished faces.

The "R" year code and plain Bonney name indicate production in 1940.


1252 CV 1-5/8 Waterpump Wrench

[Bonney CV 1252 1-5/8 Waterpump Wrench]
Fig. 110. Bonney 1252 1-5/8 Waterpump Wrench, with Inset for Reverse Detail, 1942.

Fig. 110 shows a Bonney 1252 1-5/8 waterpump wrench, stamped "Made in U.S.A." with the plain Bonney name on the face. The shank has a forged-in code "KT" at the right, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse (see inset).

The overall length is 7.8 inches, and the finish is chrome plating with polished faces.

The "T" year code and plain Bonney name indicate production in 1942.

This wrench is significant in being one of the last CV-marked wrenches produced. Bonney suspended the CV marking during the 1942-1945 wartime production years, and post-war production switched to the "Bonaloy" marking.


Fixed-Socket Wrenches


2105A 21/32 Connecting Rod Socket Wrench

[Bonney 2105A CV 21/32 Connecting Rod Socket Wrench]
Fig. 111. Bonney 2105A CV 21/32 Connecting Rod Socket Wrench, ca. 1928-1938.

Box-End Wrenches

By the late 1920s Bonney had introduced a line of box-end wrenches in several styles. These wrenches were offered in single-offset and double-offset configurations, and were built with substantial, deeply-panelled shanks, with deep depressions for added stiffness.

Bonney's first standard box wrench models were probably in the single-offset style and were likely introduced in mid to late 1929. We have several examples of single-offset wrenches with 1929 date codes, but none (at least so far) with earlier dates. In addition, a full-page advertisement from January of 1929 shows a wide range of Bonney tools, but no box wrenches at that time.

However, even before the first standard box wrenches became available, Bonney was offering a specialty box wrench for Chevrolet main bearing service, the model 2540 double-offset box wrench. We recently acquired an early example of this model, produced in 1928 and forged with a round shank instead of the familiar panelled shank of later construction.

Our first catalog reference for box wrenches is catalog No. 33 of 1933, which lists short and long double-offset wrenches, plus single-offset wrenches in a long format.

One oddity of the Bonney box wrenches is that all of the (standard) model numbers were squeezed into a 28xx model number series, ranging from the model 2804 short double-offset wrench up to the model 2839 single-offset wrench, and later adding a 289x series. The compact number range meant that various letter suffixes were needed, in some cases to indicate a long version with the same sizes as another model, in other cases to add a new size combination. As the reader can imagine, the model numbers can become a bit confusing at times.

Bonney's box-end wrenches were initially available only in chrome-vanadium steel as part of the CV line. The high-end Zenel alloy had been introduced in 1933, but initially was available only for tappet and open-end wrenches. Within a few years (by 1936) Bonney was offering box wrenches in Zenel steel as well, and this lead to even more model number confusion.

We'll begin this section with an early example of a specialty box wrench, then proceed to the single-offset box wrench series.


2540 CV 13/16x7/8 Chevrolet Main Bearing Wrenches

The next figures show early examples of the Bonney 2540 specialty box wrench, designed for servicing the main bearings of Chevrolet "4" engines.

[Bonney 2540 CV 13/16x7/8 Offset Box Wrench]
Fig. 112. Bonney 2540 CV 13/16x7/8 Offset Box Wrench, with Insets for Side View and Reverse Detail, 1928.

Fig. 112 shows an early Bonney 2540 13/16x7/8 offset box wrench with a forged round shank. The shank is marked with "Bonney" and "Made in U.S.A." forged into one side, with "Chrome-Vanadium" and the CV-Circle logo on the reverse. The shank also has a forged-in code "DT......." visible at the left, shown as a close-up in the middle inset.

The overall length is 14.2 inches, and the finish is nickel plating.

The "T" year code and CV marking indicate production in 1928. This is currently our earliest example of Bonney's box wrench production, and the only (Bonney-marked) example known with a round shank. Bonney also provided box wrenches to other tool makers as contract production, and an example of this model can be seen as the Mossberg 3011 Offset Box Wrench.


[Bonney 2540 CV 13/16x7/8 Offset Box Wrench]
Fig. 113. Bonney 2540 CV 13/16x7/8 Offset Box Wrench, with Insets for Side View and Reverse Detail, 1929.

Fig. 113 shows another example from the next production year, a Bonney 2540 offset box wrench with a deeply panelled shank. The wrench is marked with "Bonney" and "Made in U.S.A." forged into the shank, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse. The reverse shank also has a forged-in code "FU.." visible at the left, and shown as a close-up in the middle inset.

The overall length is 14.2 inches, and the finish is nickel plating.

The "U" year code and CV marking indicate production in 1929.


[Bonney 2540 (KMO-4926) CV 13/16x7/8 Offset Box Wrench]
Fig. 114. Bonney 2540 (KMO-4926) CV 13/16x7/8 Offset Box Wrench, with Insets for Side View and Reverse Detail, 1930.

Fig. 114 shows another slightly later Bonney 2540 offset box wrench, marked with "Bonney" and "Made in U.S.A." forged into the shank, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse. The reverse shank also has a forged-in code "FV." visible at the left.

The overall length is 14.2 inches. The finish is chrome plating, with some loss due to rust and pitting.

The "V" year code and CV marking indicate production in 1930. This model was listed in the 1934 Bonney catalog as a Chevrolet main bearing wrench, though the length was specified as 13 inches at that time.

Although a bit difficult to read, the side of the wrench is also marked "Kent-Moore Detroit" and "KMO 4926", indicating that this was contract production for Kent-Moore. (Kent-Moore was a major supplier of automotive specialty tools.)


The 28xx Single-Offset Box Wrench Series

The single-offset box wrench was an early style that became popular in the late 1920s and 1930s. This wrench design featured two openings of the same size, with one end offset and the other straight. Bonney produced single-offset wrenches as part of its CV line in a 28xx model series, with sizes ranging from 7/16 up to 1-1/4 inch.

Model numbers were assigned with the last two digits indicating the opening size in 32nds, so for example the model number 2818 indicated a 9/16 wrench. An exception had to be made for the largest wrench, with model 2839 used for the 1-1/4 size, as model number 2840 had already been assigned to a Chevrolet main-bearing wrench.

Bonney's single-offset wrenches were apparently first offered in 1929, as we have several date-coded examples from 1929, but none from earlier years. However, our earliest catalog reference is not until 1933. By 1936 Bonney was using Zenel steel for single-offset wrenches in the smaller sizes (model 2830 (15/16) and smaller), but continued to use chrome-vanadium steel for the larger sizes.

Single-offset box wrenches produced by other tool companies can be found elsewhere on this site. See for example the Blackhawk 2718, Blue Point X-16, Walden-Worcester 2114, and Williams 8140.


2814 CV 7/16x7/16 Single-Offset Box-End Wrench

[Bonney 2814 CV 7/16x7/16 Single-Offset Box-End Wrench]
Fig. 115. Bonney 2814 CV 7/16x7/16 Single-Offset Box-End Wrench, with Insets for Side View and Reverse Detail, 1929.

Fig. 115 shows a Bonney 2814 7/16x7/16 single-offset box wrench, marked with the Bonney name and model forged into the shank, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse. The shank also has a forged-in code "GU" visible at the right, shown as a close-up in the middle inset. The side of the wrench is stamped "Made in U.S.A.", as can be seen in the top inset.

The overall length is 8.2 inches, and the finish is chrome plating with polished ends.

The "U" year code indicates production in 1929.


2816 CV 1/2x1/2 Single-Offset Box-End Wrench

[Bonney 2816 CV 1/2x1/2 Single-Offset Box-End Wrench]
Fig. 116. Bonney 2816 CV 1/2x1/2 Single-Offset Box-End Wrench, with Insets for Side View and Reverse Detail, 1933.

Fig. 116 shows a Bonney 2816 1/2x1/2 single-offset box wrench, marked with the Bonney name and model forged into the shank, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse. The shank also has a forged-in code "JY.." visible at the right, shown as a close-up in the middle inset. The side of the wrench is stamped "Made in U.S.A.", as can be seen in the top inset.

The overall length is 9.0 inches, and the finish is chrome plating with polished ends.

The "Y" year code indicates production in 1933.


2818 CV 9/16x9/16 Single-Offset Box-End Wrench

[Bonney 2818 CV 9/16x9/16 Single-Offset Box-End Wrench]
Fig. 117. Bonney 2818 CV 9/16x9/16 Single-Offset Box-End Wrench, with Insets for Side View and Reverse Detail, 1929.

Fig. 117 shows a Bonney 2818 9/16x9/16 single-offset box wrench, marked with the Bonney name in raised letters, and with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse. The shank also has a forged-in code "GU.." visible at the right. The side of the wrench is stamped "Made in U.S.A.", as can be seen in the top inset.

The overall length is 9.8 inches, and the finish is chrome plating with polished ends.

The "U" year code indicates production in 1929.

By 1936 Bonney was using Zenel steel for wrenches of this style, which were given a "Z" prefix to the 28xx model numbers. An example of the Zenel steel successor to this model can be seen as the Bonney Zenel Z2818 Wrench later in this article.


2820 CV 5/8x5/8 Single-Offset Box-End Wrench

[Bonney 2820 CV 5/8x5/8 Single-Offset Box-End Wrench]
Fig. 118. Bonney 2820 CV 5/8x5/8 Single-Offset Box-End Wrench, with Insets for Side View and Reverse Detail, 1929.

Fig. 118 shows a Bonney 2820 5/8x5/8 single-offset box wrench, stamped "Made in U.S.A." on the side of the shank (see top inset). The shank is marked with the Bonney name and model forged into the depressed panel, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse. The shank also has a forged-in code "AU" visible at the right.

The overall length is 10.3 inches. This wrench has been pitted by extensive rust, and the original finish (probably chrome plating) has been lost.

The "U" year code and CV marking indicate production in 1929.

An example of the Zenel steel successor to this model can be seen as the Bonney Zenel Z2820 Wrench later in this article.


2822 CV 11/16x11/16 Single-Offset Box-End Wrenches

The next two figures show examples of the 2822 single-offset wrench.

[Bonney 2822 CV 11/16x11/16 Single-Offset Box-End Wrench]
Fig. 119. Bonney 2822 CV 11/16x11/16 Single-Offset Box-End Wrench, with Insets for Side View and Reverse Detail, 1929.

Fig. 119 shows a Bonney 2822 11/16x11/16 single-offset box wrench, stamped "Made in U.S.A." on the side of the shank. The shank is marked with the Bonney name and model forged into the depressed panel, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse. The shank also has a forged-in code "AU" (or possibly "BU") visible at the right.

The overall length is 11.0 inches. The original finish was likely chrome plating, but most has been lost.

The year code "U" indicates production in 1929.

[Bonney 2822 CV 11/16x11/16 Single-Offset Box-End Wrench]
Fig. 120. Bonney 2822 CV 11/16x11/16 Single-Offset Box-End Wrench, with Insets for Side View and Reverse Detail, 1929.

Fig. 120 shows another example of the Bonney 2822 single-offset box wrench, stamped "Made in U.S.A." on the side of the shank. The shank is marked with the Bonney name and model forged into the depressed panel, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse. The shank also has a forged-in code "IU" visible at the right, and shown as a close-up in the middle inset.

The overall length is 11.0 inches. The finish is plain steel with some pitting due to rust, and with traces of the original chrome plating.

The year code "U" indicates production in 1929.

An example of the Zenel steel successor to this model can be seen as the Bonney Zenel Z2822 Wrench later in this article.


2824 CV 3/4x3/4 Single-Offset Box Wrench

[Bonney 2824 CV 3/4x3/4 Single-Offset Box Wrench]
Fig. 121. Bonney 2824 CV 3/4x3/4 Single-Offset Box Wrench, with Insets for Side View and Reverse Detail, 1930.

Fig. 121 shows a Bonney 2824 3/4x3/4 single-offset box wrench, stamped "Made in U.S.A." on the side of the shank. The shank is marked with the Bonney name and model forged into the depressed panel, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse. The reverse shank also has a forged-in code "JV" visible at the right, and shown as a close-up in the middle inset.

The overall length is 11.7 inches. The finish is chrome plating, with some loss due to wear and rust.

The "V" year code indicates production in 1930.


2828 CV 7/8x7/8 Single-Offset Box-End Wrenches

The next two figures show similar examples of the Bonney CV 2828 wrench, but with slightly different markings.

[Bonney 2828 CV 7/8x7/8 Single-Offset Box-End Wrench]
Fig. 122. Bonney 2828 CV 7/8x7/8 Single-Offset Box-End Wrench, with Insets for Side View and Reverse Detail, 1929.

Fig. 122 at the left shows a Bonney 2828 7/8x7/8 single-offset box wrench, stamped "Made in U.S.A." on the side of the shank (see top inset). The shank is marked with the Bonney name in raised letters, and with "Chrome-Vanadium" and the CV-Circle logo on the reverse. The reverse shank also has a forged-in code "EU....." visible at the right.

The overall length is 13.0 inches, and the finish is chrome plating with polished ends.

The year code "U" indicates production in 1929.

[Bonney 2828 CV 7/8x7/8 Single-Offset Box-End Wrench]
Fig. 123. Bonney 2828 CV 7/8x7/8 Single-Offset Box-End Wrench, with Insets for Side View and Reverse Detail, 1929.

Fig. 123 shows a very similar Bonney 2828 single-offset box wrench, stamped "Made in U.S.A." on the side of the shank (see top inset). The shank is marked with the Bonney name in raised letters, and with "Chrome-Vanadium" and the CV-Circle logo on the reverse. The shank also has a forged-in code "FU.." visible at the right, and shown as a close-up in the middle inset.

The overall length is 13.0 inches. The original finish was chrome plating, but most has been lost to wear and rust.

The year code "U" indicates production in 1929.


2830 CV 15/16x15/16 Single-Offset Box-End Wrench

[Bonney 2830 CV 15/16x15/16 Single-Offset Box-End Wrench]
Fig. 124. Bonney 2830 CV 15/16x15/16 Single-Offset Box-End Wrench, with Insets for Side View and Reverse Detail, 1929.

Fig. 124 shows a Bonney 2830 15/16x15/16 single-offset box wrench, stamped "Made in U.S.A." on the side of the shank. The shank is marked with the Bonney name and model forged into the depressed panel with a forged-in code "CU...." at the right, and the reverse is marked "Chrome-Vanadium" with the CV-Circle logo.

The overall length is 13.7 inches. The finish is chrome plating with some loss due to rust.

The year code "U" indicates production in 1929.


2832 CV 1x1 Single-Offset Box-End Wrench

[Bonney 2832 CV 1x1 Single-Offset Box-End Wrench]
Fig. 125. Bonney 2832 CV 1x1 Single-Offset Box-End Wrench, with Insets for Reverse and Side.

Fig. 125 at the left shows a Bonney 2832 1x1 single-offset box wrench, marked with "Chrome-Vanadium" and the CV-Circle logo forged into the shank, and with the Bonney name and "Made in U.S.A." forged into the reverse. The shank has a forged-in code at the left, but the code is too indistinct to read.

The overall length is 15.2 inches, and the finish is chrome plating with polished ends.


2839 CV 1-1/4x1-1/4 Single-Offset Box-End Wrench

[Bonney 2839 CV 1-1/4x1-1/4 Single-Offset Box-End Wrench]
Fig. 126. Bonney 2839 CV 1-1/4x1-1/4 Single-Offset Box-End Wrench, with Insets for Side View and Marking Detail, 1938.

Fig. 126 shows the largest model of the single-offset series, the rarely-seen Bonney CV 2839 1-1/4x1-1/4 single-offset box wrench. The shank has forged-in markings "Chrome-Vanadium" and the CV-Circle logo on one side, with the Bonney name and "Made in U.S.A." forged into the reverse. The model number is stamped on the side of the shank, as the close-up photograph in the middle inset shows. The shank also has a forged-in code "BP....." visible at the left.

The overall length is 18.0 inches, and the finish is chrome plating with polished ends.

The "P" year code and CV marking indicate production in 1938.


Double-Offset Box Wrenches

By 1929 Bonney had extended its box wrench models to include the double-offset style. These wrenches were offered in short and long configurations, with a confusing series of overlapping model numbers ranging from 2804 up to 2812.


2805 CV 1/2x9/16 Short Offset Box-End Wrenches

The next two figures show examples of the Bonney 2805 wrench.

[Bonney 2805 CV 1/2x9/16 Offset Box-End Wrench]
Fig. 127. Bonney 2805 CV 1/2x9/16 Offset Box-End Wrench, with Insets for Side View and Reverse Detail, 1929.

Fig. 127 shows an early Bonney 2805 1/2x9/16 short offset box wrench with a deeply panelled shank, stamped "Made in U.S.A." on the side of the shank. The panels have forged-in markings for the Bonney name and model on one side, with "Chrome-Vanadium" and the CV-Circle logo on the reverse. The reverse shank also has a forged-in code "HU" visible at the right.

The overall length is 5.7 inches. The original finish may have been nickel or chrome plating, but has been lost due to rust and wear.

The "U" year code indicates production in 1929.

[Bonney 2805 Chrome-Vanadium 1/2x9/16 Offset Box-End Wrench]
Fig. 128. Bonney 2805 Chrome-Vanadium 1/2x9/16 Offset Box-End Wrench, with Insets for Side View and Reverse Detail, 1931.

Fig. 128 shows a slightly later Bonney 2805 short offset box wrench, stamped "Made in U.S.A." on the side of the shank. The deeply panelled shank is marked with the Bonney name and model forged into one side, with "Chrome-Vanadium" and the CV-Circle logo on the reverse. The reverse shank also has a forged-in code "BW." visible at the left.

The overall length is 5.6 inches. The finish may have been chrome plating originally, but is now plain steel due to rust and wear.

The "W" year code indicates production in 1931.


2806 CV 9/16x5/8 Short Offset Box-End Wrenches

The next several figures show examples of the Bonney CV 2806 box wrench, with minor differences in the markings.

[Bonney 2806 CV 9/16x5/8 Short Offset Box Wrench]
Fig. 129. Bonney 2806 CV 9/16x5/8 Short Offset Box Wrench, with Insets for Side View and Reverse Detail, 1929.

Fig. 129 shows an early Bonney 2806 9/16x5/8 short offset box-end wrench, stamped "Made in U.S.A." on the side of the shank. The deeply panelled shank is marked with the Bonney name, model, and fractional size forged into the front, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse. The reverse shank also has a forged-in code "HU" visible to the right of the panelled area.

The overall length is 6.1 inches. The finish is chrome or nickel plating, but with extensive losses due to wear and rust.

The "U" year code indicates production in 1929.

[Bonney 2806 CV 9/16x5/8 Short Offset Box Wrench]
Fig. 130. Bonney 2806 CV 9/16x5/8 Short Offset Box Wrench, with Insets for Side View and Reverse Detail, 1930.

Fig. 130 shows a similar Bonney 2806 short offset box wrench, stamped "Made in U.S.A." on the side of the shank. The deeply panelled shank is marked with the Bonney name, model, and fractional size forged into the front, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse. The reverse shank also has a forged-in code "CV" visible at the left.

The overall length is 6.1 inches. The finish is chrome or nickel plating, but most has been lost due to wear and rust.

The "V" year code indicates production in 1930.

[Bonney 2806 CV 9/16x5/8 Short Offset Box Wrench]
Fig. 131. Bonney 2806 CV 9/16x5/8 Short Offset Box Wrench, with Insets for Side View and Reverse Detail, 1931.

Fig. 131 shows another similar Bonney 2806 short offset box-end wrench, stamped "Made in U.S.A." on the side of the shank. The deeply panelled shank is marked with the Bonney name, model, and fractional size forged into the front, with "Chrome-Vanadium" and the CV-Circle logo on the reverse. The reverse shank also has a forged-in code "CW." visible at the left.

The overall length is 6.1 inches, and the finish is chrome plating.

The "W" year code indicates production in 1931.

[Bonney 2806 Chrome-Vanadium 9/16x5/8 Short Offset Box Wrench]
Fig. 132. Bonney 2806 Chrome-Vanadium 9/16x5/8 Short Offset Box Wrench, with Insets for Side View and Marking Detail, 1933.

Fig. 132 shows another Bonney 2806 short offset box wrench, stamped "Made in U.S.A." with the model number on the side of the shank, with "Chrome-Vanadium" stamped on the opposite side (see lower inset). The deeply panelled shank is marked with the Bonney name and fractional size on the front panel, with a forged-in code "JY..." and the other size on the reverse panel (not shown).

The overall length is 6.1 inches, and the finish is chrome plating.

The "Y" year code indicates production in 1933.

Although it's clearly part of the Chrome-Vanadium product line, this last example is a bit odd in not having a forged-in CV-Circle logo, and in having the Chrome-Vanadium marking stamped rather than forged-in. One possible explanation is that Bonney was considering the use of their new Zenel steel with the same forging dies used for the CV line. This dual usage would be simplified by removing the forged-in CV markings.


2805L Chrome-Vanadium 1/2x9/16 Long Offset Box-End Wrench

[Bonney 2805L Chrome-Vanadium 1/2x9/16 Offset Box-End Wrench]
Fig. 133. Bonney 2805L Chrome-Vanadium 1/2x9/16 Offset Box-End Wrench, with Insets for Side View and Reverse Detail, 1934.

Fig. 133 shows a Bonney 2805L 1/2x9/16 offset box-end wrench in the long format, with the Bonney name forged into the deeply panelled shank. The sides of the shank are stamped "Made in U.S.A." on one side with "Chrome-Vanadium" on the other. The reverse shank has a forged-in code "LZ.." (not shown).

The overall length is 9.3 inches. The finish is chrome plating, well worn in areas from extensive use.

The "Z" year code indicates production in 1934.


2811B CV 15/16x1-1/16 Long Offset Box-End Wrench

[Bonney 2811B Chrome-Vanadium 15/16x1-1/16 Offset Box-End Wrench]
Fig. 134. Bonney 2811B Chrome-Vanadium 15/16x1-1/16 Offset Box-End Wrench, with Insets for Side View and Reverse Detail, 1937.

Fig. 134 shows a rarely-seen Bonney 2811B 15/16x1-1/16 offset box wrench, marked with "Bonney" and "Made in U.S.A." forged into the deeply panelled shank, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse. The reverse shank also has a forged-in code "GO..." visible at the left. The fractional sizes are stamped on the side of the shank, as can be seen in the top inset.

The overall length is 14.9 inches, and the finish is chrome plating.

The "O" year code and CV marking indicate production in 1937, in the second cycle of the Bonney date code system.


Specialty Wrenches


2525 CV Spark Plug Wrench

[Bonney 2525 CV 5/8x15/16 Spark Plug Wrench]
Fig. 135. Bonney 2525 CV 5/8x15/16 Spark Plug Wrench, with Insets for Side View and Reverse Detail, ca. 1926.

Fig. 135 shows an early Bonney model 2525 5/8x15/16 spark plug and head-bolt wrench, a style combining a small hex box-end with a larger open end. The face is stamped "Made in U.S.A." with the Bonney name and embedded shield, and the shank has forged-in markings "Chrome-Vanadium" with the CV-Circle logo on the front, with the "2525" model number and a forged-in code "JR" (not shown) on the reverse.

The overall length is 10.1 inches, and the finish is plain steel.

The "R" year code and embedded shield marking indicate production in 1926.


1507A CV 7/8 Single-Open Wrench

[Bonney 1507A CV 7/8 Single-Open Wrench]
Fig. 136. Bonney 1507A CV 7/8 Single-Open Wrench, with Insets for Reverse and Marking Detail, ca. 1925-1926.

Fig. 136 shows a Bonney 1507A 7/8 single-open wrench, stamped "Made in U.S.A." with the Bonney name and embedded shield on the face, with the model number stamped on the shank. The reverse side is marked with the fractional size on the face, and with "Chrome-Vanadium" and the CV-Circle logo forged into the shank. The reverse shank also has a forged-in code "DP." visible at the right, shown as a close-up in the middle inset.

The overall length is 12.0 inches, and the finish s chrome plating.

A careful look at this example shows that the shank has been ground flat in the area where the B-Shield logo was forged into earlier versions. Although the "P" year code would normally indicate a 1924 manufacturing date, the removal of the B-Shield logo provides evidence of a somewhat later production date, probably in the range 1925-1926.


2526 CV 5/8x5/8 Brake Wrench

[Bonney 2526 CV 5/8x5/8 Brake Wrench]
Fig. 137. Bonney 2526 CV 5/8x5/8 Brake Wrench, with Inset for Reverse, 1928.

Fig. 137 shows a Bonney 2526 5/8x5/8 obstruction-style open-end wrench, stamped "Made in U.S.A" with the Bonney name and embedded shield on the face. The shank is marked with the model number in forged raised letters, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse. The shank also has a forged-in code "ET" visible at the left.

The overall length is 6.3 inches, and the finish is chrome plating with a polished faces.

The "T" year code and embedded shield marking indicate production in 1928.


2535 CV 7/8 Dodge Brake Wrench

[Bonney 2535 CV 7/8 Dodge Brake Wrench]
Fig. 138. Bonney 2535 CV 7/8 Dodge Brake Wrench, with Inset for Reverse Detail, 1928.

Fig. 138 shows a Bonney 2535 7/8 single-open wrench, stamped "Made in U.S.A" with the Bonney name and embedded shield on the face. The shank is marked with the model number in forged raised letters, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse. The shank also has a forged-in code "DT." visible at the right.

The overall length is 9.0 inches, and the finish is chrome plating with a polished faces.

The "T" year code and embedded shield marking indicate production in 1928. The application for this model was identified by a catalog reference in an automotive supplies catalog from around 1930.


2536 CV 7/8 Studebaker Brake Wrench

[Bonney 2536 CV 7/8 Studebaker Wrench]
Fig. 139. Bonney 2536 CV 7/8 Studebaker Brake Wrench, with Inset for Reverse Detail, 1928.

Fig. 139 shows a Bonney 2536 7/8 short single-offset wrench for Studebaker brake applications, stamped "Made in U.S.A" with the Bonney name and embedded shield on the face. The model number and a "407 S" marking are forged into the shank, with "Chrome-Vanadium" and the CV-Circle logo on the reverse. The shank also has a forged-in code "ET." visible at the right.

The overall length is 4.8 inches. The original finish appears to have been nickel or chrome plating, but most has been lost due to rust.

The "T" year code and embedded shield marking indicate production in 1928. This wrench model was apparently made for a relatively short period, and currently our only catalog reference is from an automotive supplies catalog from around 1930.


2539 CV 1/4x3/4 Bendix Brake Wrenches

[Bonney 2539 (9649) CV 1/4x3/4 Brake Wrench Wrench]
Fig. 140. Bonney 2539 (9649) CV 1/4x3/4 Brake Wrench, with Inset for Reverse, 1928.

Fig. 140 shows a Bonney 2539 (9649) specialty wrench for Bendix brake applications, combining a 1/4x1/2 stepped slot and a 3/4 open end. The face is stamped "Made in U.S.A" with the Bonney name and embedded shield, and the shank is marked with "9649" and a forged-in code "DT.." visible at the left, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 7.0 inches. The finish is nickel plating, with some losses due to rust.

The "T" year code and embedded shield marking indicate production in 1928.

The "9649" marking is an earlier model number used for this specialty wrench.

[Bonney 2539 CV 1/4x3/4 Brake Wrench Wrench]
Fig. 141. Bonney 2539 CV 1/4x3/4 Brake Wrench, with Inset for Reverse Detail, 1928.

Fig. 141 shows another Bonney 2539 1/4x3/4 specialty wrench for Bendix brake applications, stamped "Made in U.S.A" with the Bonney name and embedded shield on the face. The shank has a forged-in code "GT..." visible at the left, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse.

The overall length is 7.0 inches. The original finish was nickel plating, but much has been lost due to rust.

The "T" year code and embedded shield marking indicate production in 1928.


2542 CV 5/8x3/4 (Obstruction) Brake Wrench

[Bonney 2542 CV 5/8x3/4 Obstruction Wrench]
Fig. 142. Bonney 2542 CV 5/8x3/4 Obstruction Wrench, with Inset for Reverse, ca. Late 1920s.

Fig. 142 shows a Bonney 2542 5/8x3/4 obstruction wrench, stamped "Made in U.S.A." and "Pat. App. For" on the front faces, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse shank. The shank also has a forged-in code "ET...." visible at the right.

The overall length is 7.4 inches, and the finish is nickel plating.

The model number of this wrench is in the 25xx series typically used for specialty tools, but currently we don't have a specific Bonney catalog reference for this model. Blackhawk also offered a Model 2542 Obstruction Wrench of this same 5/8x3/4 size, which their 1929 catalog described as a Chevrolet brake wrench. It's likely that this Bonney model was also intended for that application.

The standard obstruction wrench for the 5/8x3/4 size was the model 2729, and a later example of this can be seen in the Bonney Bonaloy 2729 Obstruction Wrench.


9267 CV 7/8 Single-Open Wrench

[Bonney 9267 CV 7/8 Single-Open Wrench]
Fig. 143. Bonney 9267 CV 7/8 Single-Open Wrench, with Insets for Side View and Reverse Detail, 1926.

Fig. 143 shows a Bonney 9267 7/8 offset single-open wrench, with the Bonney name and embedded shield and "Made in U.S.A" stamped on the face. The model number is stamped on the shank, and the reverse is stamped with the CV-Circle logo and "Chrome-Vanadium", followed by the B-Shield logo. The reverse shank also has a forged-in code "JR." near the open end.

The overall length is 10.2 inches, and the finish is nickel (or possibly chrome) plating.

The "R" year code and embedded shield marking indicate production in 1926. Currently we don't have a catalog reference for this model; however, an automotive supply catalog from around 1930 lists a very similar model 2541 7/8 offset wrench designed for Studebaker brake service.


2549 Rear Main Bearing Socket Wrench

The next figure shows a specialty socket wrench designed for servicing the rear main bearings on Model A Fords.

[Bonney 2549 Rear Main Bearing Socket Wrench]
Fig. 144. Bonney 2549 Rear Main Bearing Socket Wrench, with Insets for Broaching and Detail.

Fig. 144 shows a Bonney 2549 3/4 socket wrench with a stepped offset handle, marked "Made in U.S.A." on the side of the socket. The right inset shows the front of the socket, marked with the CV-Circle logo between "Chrome" and "Vanadium" in script.

The overall length is 15.6 inches. The finish is chrome plating with a polished top to the socket.

The 3/4 socket is a 12-point broaching, and some chatter marks are visible on the walls, indicating cold-broached construction. This tool was listed in the 1938 Bonney catalog, but was probably offered for some years before that as well.


2575 "CV" Ford Drain Plug Wrench

[Bonney CV 2575 Ford Drain Plug Wrench]
Fig. 145. Bonney "CV" 2575 Ford Drain Plug Wrench, with Insets for Reverse and Side View, 1933.

Fig. 145 shows an unusual Bonney 2575 specialty wrench, designed for Ford drain and filler plug service. The shank is forged with depressed panels, marked with the Bonney name, model number, and "Made in U.S.A." forged into the front, with "Chrome-Vanadium" and the CV-Circle logo forged into the reverse. The reverse also has a forged-in code "KY" to the right of the panel area, though a bit difficult to read.

The overall length is 10.1 inches, and the finish is chrome plating.

One end of the wrench has a 15/16 hex socket to fit the crankcase drain plug, and the back of the socket has a 7/16 square plug for the differential drain and filler plugs. The other end of the wrench has a 5/8 double-square box opening, suitable for the transmission drain and filler plugs.

The "Y" year code and CV marking indicate production in 1933.

This wrench was first introduced in a May 1933 catalog supplement as a Ford drain plug and filler wrench. Later Bonney catalogs listed the model 2575 wrench in the section for special Ford wrenches, and it remained available at least through 1940.


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