These revolvers were manufactured around the mid-1870s as cartridge revolvers using percussion parts on hand and newly fabricated cartridge revolver components. They are generally numbered in the 100-3300 range like this revolver. The barrel has a blade front sight, an ejector fitted on the right, a re-contoured and filled lug, and "-ADDRESS COL SAML COLT NEW-YORK U.S. AMERICA-" marked on top. The left side of the frame is marked with the two-line "-PAT. JULY.25.1871.-/-PAT.JULY. 2. 1872-" patent markings, and the left side of the trigger guard is stamped with "38 CAL." The full serial number is located on the bottom of the barrel lug, the frame, trigger guard, and back strap, and a "1" is also marked by the serial number on the frame, trigger guard, and back strap. The cylinder has the partial serial number "466." The loading gate is marked "3420." The hammer has a firing pin for rimfire ammunition pinned to the left side.