This is a standard U.S. issue Colt Single Action Army manufactured in 1880. The D.F.C. David Clarke inspector stamp can be found on bottom of frame and side of cylinder. Matching numbers on frame, trigger guard, backstrap, and cylinder. Cylinder also has the "P" stamp. Three line address on frame with U.S. stamp. The barrel is a replacement with no serial number, inspector, or caliber with a 2-3/8" address that can be seen on page 105 in the book "Cavalry and Artillery Revolvers". The one piece walnut grips are also a replacement part with no number in channel, no visible inspector mark, and slightly shy to metal. Has the proper hammer and donut ejector head. Barrel legend is sharp. Metal is basically a smooth blue-brown patina. Indexes perfectly with all four clicks. Bore is near mint. Fine Indian Wars Cavalry Clarke inspected with notes to the replacement parts. Serial Number-56106; Manufacturer-Colt; Model-SAA; Caliber-.45 LC; Barrel Length-7-1/2"; FFL Status-Antique;