I attended a local "Toy Show" today and a S&W Mod 15-4 (Combat Masterpiece) followed me home. It was kinda "grungy" but cleaned up well -- except for one minor detail. At some time or other some miscreant has taken what appears to have been an 8d nail or similar instrument and scratched what appears to be an ID # on both sides of the frame as well as "CAMU". The bore us nice and shiny, the cylinder locks up nicely, cyl gap will pass a .003 feeler gauge but not a .004". the serial #is 91K99xx. All in all, I bought it as a "shooter", which I think it will do nicely. My question is: year of mfg and is it +P rated? Any info/help is appreciated. TIA Stan