Manufactured circa 1860 to 1868, this is an example of one of the approximately 4,400 2nd Issue revolvers that were marked "2D. QUALITY" due to a slight casting flaw during manufacture. This revolver is marked "2D QUALITY" on both sides of the rear of the barrel. The top of the barrel is marked with the one line address, the serial number is marked on the butt, the cylinder is marked with the patent dates and the back of the barrel lug is marked "JJO". The barrel and cylinder are finished blue, casehardened hammer and trigger, and the frame is silver-plated brass. Fitted with smooth two-piece rosewood grips.