In the early 1960's Interarmco (Interarms) purchased the Britishgunsmithing firm, Cogswell & Harrison. The were then charged with converting Smith & Wesson .38 S&W revolvers to .38 Special and .22 rf. They also converted No.1 MkIII rifles to a sporterized version. The sporters had a black painted tip on the shortened forestock and a sheet metal ramp that fits around the front sight. These are legitimate sporters and we should think twice before altering or parting them out.