These Third Model Colt Derringers were introduced in 1870. The top of the barrel has a rounded blade front sight and "COLT" in large italic letters and the bottom of the barrel has small British proofs. The caliber marking is on the left of the frame. The matching serial number is faintly marked inside each grip. Includes a leather wrapped case with Colt London agency marking on the interior of the lid, two .41 RF cartridges, and a cleaning rod.