M-37 Pto ?

[rumplecat]

I need a pto for my M-37, I going from an WOW to a WW. I need the pto and split bumpers. I now have someone who wants to sell me a pto, how do I tell it is the right one of a 1952 M-37, I have seen several post over the last few months of people buying the wrong pto, are there any identifying marks on the pto??
Any help is appreciated.
Thanks,
James G.