[Jacques Reed]

Further to the part numbers previously listed:

The first digit after the "C" in the part number is the year the part was designed and released.

Therefore the knuckles starting with C1 were designed and released in 1941 and the one with the number starting with C0 were designed and released in 1940.

Points to early pre 1941 CMP F15A's had the two size studs on the knuckles and later they standardized them to the larger 1/2" diameter studs.

Both sides of my 1944 model have 1/2" diameter studs.

No doubt there would be exceptions due to using up old stock post 1941 and replacement parts.

I bought the early 7/16" stud NOS knuckle for a spare a while back and only realized the difference when I brought it home. Thought maybe it was for a Marmon Herrington afterwards so on the shelf it sits. Anyone want it?

Cheers,