Manufactured in 1870. The top of the barrel is marked "-ADDRESS COL. SAML. COLT NEW-YORK U.S. AMERICA-" and "COLTS/PATENT" is on the left side of the frame. The cylinder is roll engraved with the Texas naval battle scene and marked "ENGAGED 16 MAY 1843" on the front edge and "COLTS PATENT No 646". The complete matching serial number is marked on the bottom of the barrel lug, frame, trigger guard and back strap, and the cylinder and cylinder pin are marked with the partial serial number "646". The wedge is un-numbered. The barrel, cylinder and back strap have the Colt high polish blue finish. The loading lever, frame and hammer are color casehardened and the brass trigger guard is silver-plated. Blade front and hammer notch rear sights, and fitted with a smooth one-piece walnut grip.