I have always felt that the important thing with a Model 37 (or ANY shotgun) is to get one WITH A RIB. I wouldn't want one without a rib. I would also think that full choke would be the most common. I have a model 37 that (I believe was made around 1953). Solid Rib- 20 gauge- full choke. It was the first shotgun I ever bought when I was about 16 years old. I had it reblued and I will never let it go. There is one for sale right now that I was just looking at on American Trapshooter.com with a spare rib and probably some on Guns International. But I don't think that any Ithaca Model 37 is THAT big of a deal or rarity in any configuration- money-wise. Good luck.
