seriesonelandy
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Were there any differences among the M151A2s according to their production years i.e., did the early A2s differ in anyway from the late A2s - visibly or otherwise? If data plates do not exist and documents do not indicate the production date, is there any other way one could estimate the production year group ( for example, 1969-72 or 72-74 or 74-79 and so on)?