One of around 3300 made between 1864 and 1872. Blade front and notch rear sights, with "WM. W. MARSTON/PATENTED/MAY 26. 1857/NEW YORK CITY/IMPROVED 1864" on the left side of the frame, and the selector/indicator knob and 3-prong extractor on the right. Matching numbers are present on the frame, barrel, and grips. The rear sight doubles as the barrel latch. Smooth spur trigger, checkered hammer.

Fine. The barrel shows traces of the original blue finish, concentrated on the right side, with a mixed gray patina overall. Over 70% of the original silver is present on the frame, with a well aged patina on both the silver and the exposed brass. Grips are very good, with some dings and flat spots. Mechanically fine.