Hobart A200 with no spec plate

Hello,
         It has been raining hobarts for me lately. I bought a N50 , then two days later was given an A200.
   It had been living in a basement , covered in a film of oil. I got it home and dismantled it to prep it for paint ....but it doesn't have a spec plate, as I sanded I found the numbers in the photo stamped into the body, but when I look online at the available ML numbers there is nothing close.

Any ideas?

Al.