This late 18th century blunderbuss is marked with "I/HALL" and a crown on the lock, a diamond over "IH" mark flanked by London commercial proofs on the left at the breech, and "LONDON" on top at the breech. The brass furniture has light engraving. The muzzle flares out to just over an inch, and the gauge is estimated above. The stock is smooth and has a raised flat around the barrel tang and a fluted comb.