Manufactured in 1861. The rebated cylinder has non-factory fluting with "PAT. SEPT. 10th 1850" stamped in one of the flutes. The barrel has the one line New York U.S. America marking, "COLTS/PATENT" on the left side of the frame and a small letter "D" on the left trigger guard shoulder. Matching numbers on the barrel, frame, grip straps, and arbor pin with the wedge having been renumbered to the gun. It has a four screw frame cut for a stock and a smooth one-piece grip.