You got a very nice gun. I have a 37R, 20 gauge, solid rib, full choke, serial # 75029 that I have had since I was about 16.(1965) It was made in 1948 the year after I was born. I hunted with it for years. I had it reblued back in the 70s and it looks like a new gun. I retired it several years ago but I did take it out once last summer and shot a round of skeet with it. It would probably be about the last gun I ever sold. Nice gun. Good luck. You have a dandy.