I traded into a very nice 5" Model 27 Friday. I don't have the SN, as I left it in my display case at the gun show but it is ~ S200xxx. I've never had one before but it goes well with my other 5 screw 357's from the early an mid 1950's. I understand these carry a pretty hefty premium over other Model 27's. It had some nice smooth targets on it which I know are not correct but I had a set of magnas, numbered S210xx that I put on it. Any insight on the current market on these? I'll check in later, after the show with pictures.