This revolver was manufactured in 1862 and has the "I" suffix stamped above/below the main serial numbers used to indicate special order grips like the one found on this revolver. The grip also has the matching partial serial number properly handwritten in black ink in the back strap mortise. It may have been ordered by or for a Union Army officer as the Model 1851 Navy was the standard sidearm of the period. It has a brass cone front sight, "-ADDRESS COL. SAML COLT NEW-YORK U.S. AMERICA-" along the top of the barrel, the standard Naval Battle of Campeche scene and patent markings, and all matching serial numbers.