A FLEMISH FLINTLOCK BOX-LOCK FOUR-BARREL TURN-OVER COAT PISTOL with rifled turn-off cannon barrels each engraved on the breech and fitted with its own pan and steel, signed action engraved with rococo ornament, two cocks and two triggers, engraved trigger-guard releasing the barrels, thumbpiece safety-catch, and globose figured walnut butt, by Marichalle à Liège, late 18th Century