About .69 caliber. 7" octagonal barrel. SN: NSN. Possible blued metal finish to barrel and case hardened finish to fittings. Walnut stock has a checkered grip and plain forearm. Percussion pistol with micro-groove bore, notch rear sight, and blade front sight. Fittings are engraved with simple floral scroll. Includes ramrod. Item is cased in a walnut box with purple velvet interior, and accessories.