This Colt Model 1861 Navy revolver was manufactured near the end of production in 1873. It is number 37765 of just 38,843 '61 Navies manufactured in 1861-1873. Aside from the special nickel plated finish, the exterior markings and features are standard, including all matching serial numbers (wedge blank, grip correctly marked "7765" in black ink). The unique stamping on this specific revolver is "B"/?/"N" stamped on the interior face of the recoil shield, obviously denoting nickel.