Colt M1851 London Navy revolver manufactured in 1856. This Second Model London M1851 Navy revolver has the distinctive steel backstrap and large oval trigger guard. The hammer spur has the bordered knurling found on London Navy hammers. The cylinder is roll-engraved with the Texas Navy battle scene. The barrel, cylinder, trigger guard and backstrap are blued, the loading lever, frame and hammer are case-hardened and the one-piece walnut grip is varnished. The top barrel flat is roll-stamped with the legend: "- ADDRESS COL. COLT LONDON -" in a single line with dashes at either end. "COLTS/PATENT" is stamped in two lines on the left side of the frame. British "Crown/V" and "Crown/GP" proof and inspection marks are stamped on the left side of the barrel lug and on alternate cylinder chambers. The full serial number, "40233" is stamped on the loading lever, bottom of the barrel lug, frame, trigger guard, backstrap and cylinder. All of the serial numbers match. Total production of the Colt London M1851 Navy was approximately 42,000 revolvers manufactured between 1853 and 1856.