My late father-in-law liked my doubles and said he's like to have one - a 12 gauge and not too expensive. I found him a Model B at a gun show: c. 1960, case colored frame, walnut wood, double triggers, vent rib. great condition. He never got to shoot it much but I did get to see him dust a few clays with it; one of the things he liked was that it "had some weight to it." You don't hear that statement often in double gun circles! When he passed my mother-in-law gave it to me; later I decided she needed the money more than I needed the gun so I sold it - one of the few guns I've ever sold and the only one I regret selling.
As for those Stevens guns marked 5100 I have three - a 16, a 20 and a .410. They were the first sxs's I acquired and they've done me right proud, and I'm not sure I don't shoot them better than any of 'em.