London, early 19th century, single shot, round, 9-1/4 in., steel barrel with British and Belgian proof-marks, engraved "LONDON", finely engraved lock, lock plate with leaf decoration, walnut stock, ramrod, brass side plate, escutcheon, trigger guard, plate, buttcap

working mechanism, ramrod likely associated, crack at barrel stock, finish loss, infill at side pin, other typical wear and abrasions, metal with pitting, corrosion