I bought a used Winchester Model 12 in 12 gauge which I discovered from the S/N was made in 1931. Since it was used, I don't know how much of it is original and how much was changed/replaced. It has a Cutts compensator which I believe was an aftermarket add-on, since the barrel is stamped with a full choke designation. I understand that collectors describe model 12s as one of 11 different configurations, i.e. trap, field, riot, etc. I would like to determine which one mine is, but it does not fit neatly into any of the categories, and seems to have elements of more than one. It has a Pachmayr white line recoil pad, a sunburst shaped grip cap, checkering on the pistol grip, checkering on the bottom but not the sides of the fore-end, a 25 1/2 inch barrel including the Cutts expansion chamber, a machined rib, and a plain, un-engraved bolt. I'm including three images. I am thinking about cutting the barrel just behind the Cutts to shorten and open it up, and put a straight stock on it to make it more of a defense/upland gun. Before modifying it though, I want to establish that it is not an uncommon or valuable variant. Any comments would be much appreciated. Thanks.