so i have what i'm pretty sure is a sm 420. there are a bunch of numbers cast into it. on the cover, GM6, 591588, on the side is j 1860 which i think is date code for oct 18 1960?
then under that, the number 3 and under that, 3761930. there is also the letter T stamped in the side. in addition, there is a spicer box coming out of what i think is a PTO on the side.
any help would be great.
thanks
