Manufactured between 1864 and 1872, this pistol shows the fine New York pattern of engraving, with it's emphasis on punch dot backed scrollwork and intertwining line patterns, as exhibited in most of Nimschke's work. 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. The rear sight doubles as the barrel latch. Smooth spur trigger, checkered hammer.

Very good, with 20% of the original blue finish, concentrated in the barrel flues with a mixed gray and brown patina and scattered spotting overall. A few traces of visible silver are present on the breech face of the frame, with a well aged brass patina overall and mild dents. Grips are good, with some chips absent from the butt. Mechanically functions, but freezes up on the number three barrel.