A 12-BORE D.B. FLINTLOCK GUN with rebrowned twist barrels engraved 'John Manton and Son Dover Street' on the rib, case-hardened recessed patent breeches each with platinum-lined touch-hole, flat bevelled locks stepped at the tail and engraved 'Jno Manton & Son Patent', rollers and swept rainproof pans (cocks not a pair), figured walnut half-stock, chequered grip, engraved iron mounts (some pitting), silver escutcheon, and brass-mounted ramrod, London proof marks, No.10299, circa 1825-30