This large British flintlock blunderbuss was intended for use on naval ships with a swivel bracket. The barrel has London commercial proofs. Faint traces of markings visible on the lock. "A.S.BRETT" marked in the wood behind the lower trigger guard tang. The bore measures at approximately 1.1 inches (approximately 4 bore), and the muzzle flares to 3 inches. Measures 52 inches in overall length. Absent ramrod.