U.S. contract Colt Single Action revolver manufactured in 1876 and sub-inspected by Lewis Draper (L.D.) on the bottom of the frame. This revolver has been altered to "Artillery" configuration with 5 1/2-inch barrel and mixed serial numbers. The barrel is from an Ainsworth sub-inspected Cavalry Model revolver and has the early features which include: (1) ejector housing with boss pin, (2) first style script address, and (3) small Ainsworth "A" sub-inspection mark below the "P" proof on the underside of the barrel. The cylinder is from an early Ainsworth sub-inspected revolver and has small rectangular stops and is stamped with a "A" sub-inspection mark and "P" proofmark. In addition to the "L.D." sub-inspection mark stamped above the serial number, the frame is roll-stamped with the Colt "Two-Date/Two-Line" patent markings followed by a "U.S." property mark. The ejector rod has an early "bullseye" head. The hammer has elongated, bordered knurling on the spur. The assembly number "5745" is stamped on the inside of the loading gate. The barrel is serial numbered "5219" and the cylinder is numbered "2092". The trigger guard is numbered "114373/G," and the back strap is serial numbered "138/229/K". There are no visible inspection marks or dates on the one-piece walnut grip. Experts speculate that some U.S. Contract Artillery Model revolvers with mixed serial numbers may have been altered to Artillery configuration by Colt or Springfield Armory prior to the Spanish American War and subsequently refurbished at Benicia Arsenal in California or Manila Arsenal in the Philippines following the war. This revolver has a military blue barrel, ejector housing cylinder, trigger guard and back strap. The frame, loading gate and hammer are color casehardened.