Fine gun. Check the sharpness of the stamping. If the edges are sharp, it probably has not been reblued. Most nickel steel Model 12's have been reblued, since the nickel steel would not hold bluing very well. If it has not been reblued, it was very lightly used, and is a real find. It is safe with any 2 3/4 inch shells (I don't think I would use steel or heavy shot). In the old days, whichever shotgun onehad was used with slugs. I have seen several Model 12's shoot slugs quite wellusing just the original bead sight.I haveownedseveral Model 12's in the past, and IMO it is the finest pump shotgun ever made.