.45 caliber. 3" twist-off barrel. SN: NSN. Blued finish, checkered walnut grip. Lightly engraved frame marked "TRYON" on the reverse and "Philadelphia" on the obverse. Bottom of frame and barrel with post-1813 Birmingham proof marks, bottom of barrel with maker's mark "R*H". Single action, folding trigger, single-shot pistol. This is a perfect example of the types of inexpensive firearms that were imported from England by American retailers and gunmakers during the first half of the 19th century for resale in the American market, often bearing the retailer's name and location, rather than the English gunmaker's name.