This Fourth Model 1851 Navy Revolver was manufactured by Colt in 1861 for the civilian/commercial market and has a dovetailed blade front sight, standard hammer groove rear sight, the one-line New York barrel address, standard "COLTS/PATENT" marking and cylinder scene, and matching serial numbers which generally also have the " ' " mark used by the factory to designate special features such as the grip on this revolver which is correctly hand numbered in the back strap mortise with the matching partial serial number. The open toe leather flap holster has no visible markings and appears to have original been finished black. Many of the Civil War era commercial handguns were purchased as private sidearms by soldiers.