Colt Model 1861 Navy Richards-Mason conversions were manufactured/converted in the mid to late 1870s as cartridge revolvers using a mix of percussion revolver parts on hand and newly fabricated components. The U.S. Navy used many of these. The revolver has a blade front sight, the "-ADDRESS COL. SAML COLT NEW-YORK U.S. AMERICA-" barrel address, standard naval cylinder scene, the distinctive breech plate without a rear sight, a "476" marked loading gate, centerfire firing pin on the hammer which has a small notch for a rear sight, "COLT/PATENT" on the left side of the frame along with the added 1871 and 1872 patent dates, "36 CAL" on the left side of the trigger guard, and matching visible serial numbers apart from the cylinder which is marked "1133". The serial numbers on the frame and trigger guard appear to be stamped over another number.

Fine, retains 30% factory refurbished blue finish primarily on the ejector and sheltered areas of the barrel lug, 40% of the case colors, with the balance a brown-grey patina and mostly clear markings. The refinished grip is very good with some moderate wear primarily around the edges, a moderate scuff in the left side, and light dings and scratches scattered throughout. Mechanically excellent.