A PAIR OF PERCUSSION BOX-LOCK PISTOLS, converted from flintlock, with three-stage turn-off cannon barrels, signed border engraved actions engraved with rococo ornament, engraved trigger-guard safety-catches, swelling flat-sided figured walnut butts finely inlaid with silver wire scrollwork (minor losses), silver escutcheons engraved with owner's crest, and grotesque mask butt-caps (iron parts with slight pitting overall), by Thomas Richards, Birmingham private proof marks, circa 1775