I have the 16ga Winchester Model 12 that my father had. The earliest I can remember is about 1935 and he had it then. When he was a young man, he did a lot of bird hunting but by 1935, he was 51 and I do not remember him doing any hunting with the Winchester Model 12 so I suspect that most of its usage has been my hunting doves, ducks, quail, and geese. Probably my hunting days are over and I want to know more about the gun. On the bottom of the receiver is a number which I suspect is the Serial No. which is 649923. And I certainly agree with all the comments about it being a fine gun.