...Mike, I also have my original brake handle out of my 37 and it is also like the first picture. I also had an original parts truck once and the brake lever was the same as the first pic.
I also had a 1 1/2 ton 37 but can't remember the brake handle in it. With the way it was bent could it have possibly be from a COE? Just speculating here. I'm always curious!!!
..... I personally have never seen a handle like the second pic and it appears to be missing parts you would have to track down...buyer beware?!
Good luck.