Marked "BARNETT/LONDON" on the lock plate in front of the hammer, "BARNETT/ GUNMAKERS/ LONDON" in an oval cartouche on the right side of the stock. "W.R" is stamped on the stock opposite the lock and the London "crown/ V" and "crown/ GP" proofs are on the upper left rear of the barrel, which has a blunderbuss-type muzzle which flares out to nearly 3 inches wide. A ten inch iron yoke is fitted to the forearm in front of the lock plate, most likely used on ship. The heavy iron trumpet headed ramrod has a single brass pipe. The buttplate and trigger guard are also brass.