Only approximately 9,000 Richards conversion Model 1860 Army revolvers were manufactured between 1871-1878 based on designs by Charles B. Richards, who was also one of the designers of the Colt Single Action Army. These revolvers were manufactured alongside the Single Action Army and are believed to have seen significant use in the Old West. The top of the barrel is roll-stamped "-ADDRESS COL. SAML COLT NEW-YORK U.S. AMERICA-" in one line. "-PAT. JULY. 25. 1871-/-PAT. JULY. 2. 1872.-" is marked on the left side of the frame. The cylinder has the classic naval battle roll scene. The barrel has a blade front sight, and a notch rear sight is on the breech plate. Matching serial numbers are visible on the cylinder, barrel, frame, trigger guard, and back strap. The assembly number "471" is on the loading gate.