M101A1 date of manufacture ending?

[juanprado]

What year did the M101A1 trailers stop manufacture and switch to M101A2 model?

Trying to give a trailer a date with no bed M101 or frame M116 data plate.

Thanks for your input!

 

[juanprado]

If it helps others, I found on the website army property that m101a2 first contract was 1980 so I assume last m101a1 had to be 1980 or earlier