Alan Achor sent me these pictures in 1998. The descriptions are edited from Alan's letter:
I think this trio of netted floats is a group of Northwestern-made floats. The only mark visible on the bottom of the floats is a small, faint oval, with no lettering visible. The oval is the same size as the oval on another float with the "NW" lettering.
This next photo shows two loose floats with netting. The amber float is a Northwestern-made float with the "NW" in an oval with the number "3" below it. The clear float has an Owens-Illinois trademark with a "20" to the left, a "2" to the rigth, and "7" below.
In this picture of five floats, notice that one of the amber floats is much darker than the other. Neither of these has a trademark. Of the two clear floats with metal shackles on the seal knob, one has the maark shown in photo 4, the other others have the mark shown in the close up photos that follow. The shackles are secured with wire wrapped around the knob. I don't know if the wire and shackles are authentic fishing gear or not.
Here are some close ups of the markings on the clear floats pictured above.
Here are the pictures of a 3.25" diameter float with the symbol that I was told means "mountain". The symbol is not listed in Amos Wood's book except as part of a symbol listed as #25. The float is more aqua and less green than the bottom photo indicates. The "T" symbol is embossed twice on the float, and each is a little different.
Notice that the two halves don't make a perfect sphere, they join at a slight angle.
