[m22mike]

Originally Posted by bcmiller

All Eaton 12 bolt posi carriers received a stamped assembly date code. The code was in the format of letter / number / letter. It seems be be fairly well known that J was used for 1969. Do we know the letters used for 1965, 1966, 1967 and 1968?

Thanks in advance.

I think they used letter A to k. For the year (did not use I ) J being 1969 you should be able to count back from there.