My friend brought me an old top break revolver that needs repaired. I think it’s a smith and Wesson, it’s nickel plated and marked 38 S.&W. Ctge. On left side of barrel and ser. no. 412806 on the butt. The black plastic grips have a target emblem with 5 shots in it. The hammer is flat sided and the trigger guard is rounded all around. If I figure out how to add pics I will. I need to ID this gun and find a drawing. It has a broken spring so it would be really good to find a source to buy parts.