I ran across an older S&W revolver and was wondering if you could help me with an ID. Nickel plated, small frame, 32 S&W Long. 6" pencil barrel. Serial number has six digits starting with a two. Old style stocks, serial number on the front strap. There is a knurled round piece where the front of the ejector rod locks. I must admit, these earlier revolvers are totally outside my very limited knowledge of things S&W.