Made in Hartford, this .36 caliber revolver has a six-shot cylinder and a 7 1/2" octagonal barrel with loading lever. The grips are one-piece varnished walnut; the grip straps are silver plated brass. The serial # 129xxx places its manufacture in the middle range of the Civil War. The top flat of the barrel is marked Address Col Saml Colt New York U.S. America (in one line). The side of the frame is marked Colts/Patent. It has the standard, roll engraved Navy battle scene on the cylinder, but the metal has darkened to the point where only traces are now visible, but the markings, "Colt's Patent" and the last four digits of the serial number are extremely clear. There are also several inspector's marks ("S") in various places on the metal. This is a 4th model M1851 with the large, rounded brass trigger guard. The fact that it has been milled for a shoulder stock attachment makes this one particularly desirable. All numbers match (including the cylinder and wedge) and the metal has aged to an even, attractive plum color. It would be difficult to find a Colt of this caliber at a more reasonable price today.