Distinguishing Features for each year / model Henry J
Since the Henry J featured bolt-on fenders and used the same body shell for all 4 production years, it is not uncommon to encounter cars that were restored / repaired using parts from different models, thus combining features from several model years. One of the most common modifications seen is a 1952 - 54 Henry J, with a 1951 grill. The 1951 grill seems to be more popular, and is definitely more abundant, so enthusiasts will sometimes replace the newer style grill with the earlier style.
Each year and model does have its distinguishing features. The most apparent feature that differentiates each model is the hood ornament. Another very common modification encountered is a Henry J with a hood ornament from a different model year. I have seen a number of 1952 - 54 Corsair models sporting 1951 hood ornaments. There were over twice as many 1951 models produced than there were for all 3 remaining years combined so it is not uncommon to see 1951 style hood ornaments (and other appointments) on the later cars. From the 1950s through the 1990s, many old cars sat in salvage yards, hence many were vandalized. A very easy, and cool piece to steal or break was the hood ornament. Another factor that contributed to broken hood ornaments is that they had plastic components which people tended to grab when raising or closing the hood, hence breaking the plastic pieces. This left many old cars with broken or missing hood ornaments. The Henry J was no exception so restorers may not have known which was the original type. If the hood ornament is/was missing, and a they found a 1951 style, it was easy to install on the car, even if the car was a 1952 - 54 Corsair model. This also occurs because the correct one simply cannot be found. The most difficult one to find is probably the 1952 Corsair / Corsair Deluxe style hood ornament.
Here are photos of the correct hood ornaments for each model year:
The 1951 Henry J hood ornament -

The hood ornament is a key distinguishing feature of the 1951 Henry J. As mentioned, many restorers have used the 1951 hood ornament on non-1951 models when the original type was not available.
A scaled-down version of the 1951 Kaiser hood ornament, this style was originally used on the 1951 models only. It features a tip with two small grooves and a round barrel, both molded in CLEAR plastic. Also, 1951 Henry Js did not have any badging or model designations on the front fenders. All later cars either said "Vagabond", "Corsair" (four cylinder model) or "Corsair Deluxe" (six cylinder model) on the front fender flank.
The 1952 Henry J Vagabond (early '52) hood ornament -
Notice the 1952 Vagabond hood ornament is the same as the 1951 model but the plastic trim is molded in black plastic instead of clear plastic as the earlier cars were. It is a scaled-down version of the ornament used on the 1952 Kaiser Virginian. It is not unusual to see 1951 Henry Js with the black plastic on them as some restorers, and even dealers back in the days, would replace the clear pieces with the black pieces when the correct ones could not be found. Since there were fewer 1952 Vagabonds made, dealers often had more excess stock of this type so it is not unusual to find 1951 models that have had the original replaced with this type. This ornament is truly authentic only on 1952 Vagabond models.
Since 1952 Vagabond models were simply left over, re-serialed 1951 models, they too have few distinguishing features. The other distinguishing feature is the script on the front fenders which reads "Vagabond." Most 1952 Vagabonds, feature a Continental spare tire on the back.
NOTE: In the advertising literature, the Continental Spare tire is listed as a standard feature on the '52 Henry J Vagabond. I have seen a few that did not have this feature so just because it doesn't have one, does not mean the car is not a Vagabond. Also, even if all Vagabonds had the spare tire on the back, it still is not a distinguishing feature as the Continental Spare tire was a factory option available on all Henry Js. As a result, many cars that are not Vagabonds still sport this feature.
The 1952 Corsair / Corsair Deluxe hood ornament -
The 1952 Corsair models feature this hood ornament. It has a small metal fin on top and sports a flat/oval tube with a forward jutting look and a grooved, clear plastic tip, similar to the tip found on the 1951 model. This hood ornament is actually a scaled-down version of the one used on the 1952 Kaiser Manhattans and Kaiser Deluxe models.
Other distinguishing features of the 1952 Corsair and Corsair Deluxe models are - The front bumper is pointed but the rear bumper is the flatter style, the same one used on the 1951 models. The 1952 Corsair and Corsair Deluxe also feature a standard glove box but still have the same gauge cluster as the 1951 models - this configuration is unique to the 1952 Corsair / Corsair Deluxe models.
The 1953 - 54 Corsair / Corsair Deluxe hood ornament -

The 1953 - 54 (the '54s were just unsold '53s that were re-serialed) Corsair / Corsair Deluxe models feature this hood ornament. It has chrome metal wings and the clear plastic tip has three "rocket" fins on it.
The 1953-54 Henry J hood ornament, unlike the 1951 and 1952 models, is the only one that is not a scaled down version of its Kaiser counterpart. The 1953 Kaiser cars had a completely different looking ornament. Remember, the 1951 - 52 Henry Js feature hood ornaments that are smaller versions of the Kaiser cars of the same year.
A common modification seen on the 1953 - 54 hood ornament is the replacement of the finned tip, with the earlier grooved style found on the 1951 - 52 cars. Since the plastic tips on these were easily broken, and the correct "finned" type tip is rare and very hard to find, restorers often had no choice but to replace a broken or missing tip with the earlier style tips which are easier to obtain. Seeing a 1953 Henry J with the correct tip is always a treat at shows.
Other distinguishing features of the 1953 - 54 cars include a semi-circular speed-o-meter on the gauge cluster, windshield wiper knob is now on the front of the dash, above the ignition switch instead of top center of the dash as on the earlier cars. The 1953 -54 cars featured a pointed rear bumper, the same as the front one (remember, 1952 cars had a pointed front bumper only, the rear was still the flatter style used on the 1951 models) which increased overall car length. The 1953-54 Henry J also featured a dome light which necessitated moving the rearview mirror down and mounting it on the center windshield trim bar. This is why the 4 cylinder models, despite lacking the bright work around the front and rear windshields, still had a single chrome (stainless) bar down the center of the windshield. It was needed to mount the rearview mirror. The seats in the 1953-54 cars were larger and more "plush" than the earlier cars. The 1953 - 54 Corsair Deluxe models featured a vinyl covered dash.
As mentioned before, most of these parts are interchangeable so you often see mixed configurations. Due to parts availability and in some cases, ignorance, truly authentic examples are becoming more scarce and these features may not always identify the cars . The best, and only real way, is to look at the body tags (and those have been known to be forged too).
If the serial number begins with:
K513 the car was originally a 1951 four cylinder model
K514 the car was originally a 1951 six cylinder (Deluxe) model
K523-1 the car was originally a 1952 Vagabond four cylinder model
K524-1 the car was originally a 1952 Vagabond six cylinder (Deluxe) model
K523 the car was originally a 1952 four cylinder Corsair model
K524 the car was originally a 1952 six cylinder Corsair Deluxe model
K533 the car was originally a 1953 four cylinder Corsair model
K534 the car was originally a 1953 six cylinder Corsair Deluxe model
K543 the car was originally a 1954 four cylinder Corsair model
K544 the car was originally a 1954 six cylinder Corsair Deluxe model