John Hall's London shop was active from the early 18th century until around 1770, even though he died in 1740, and is known to have manufactured brass barreled blunderbusses. The flared muzzles made reloading much easier on horseback or on the rolling seas, and the primarily brass fittings were more resistant of salt water corrosion. The barrels have 1.1 inch inside diameters at the muzzles and approximately 16 gauge (.65 caliber) bores. The tops are inscribed "London," and the left sides at the breech have London Gunmakers' Co. private proof and view marks flaking a gunmaker's hallmark that consists of a crown over an illegible letter (likely "crown/H" for Hall). The locks are inscribed "Hall" ahead of the cocks. There are some engraved floral accents throughout, and the trigger guard has an acorn finial. The stocks have shell carving at the barrel tangs and ornate thumb plates.

See "A".