Manufactured from 1868 to 1881. One line barrel rib address/patent dates marking on the left side of the scarce 2 11/16 inch barrel. Matching numbers marked on the butt and inside of the right grip panel. The matching assembly number "W5" is marked on the frame under the grip, front cylinder face and back of the barrel lug. Nickel finish and fitted with smooth varnished bird head grips.