A late 18th Century Continental round-the-barrel reservoir smooth bore air gun, probably German, with pump in the butt, Flintlock action, the 36 1/2in. barrel with bronze/brass outer casing in two stages smooth and octagonal, decorated with semi-circular coronet pattern collars at the breech and two-stage join, full stock with mounted wood ramrod, ornate brass trigger guard and plain straight stock with brass butt plate, stamped 'N2', scratch marks 'FW8' and 'U5', 51 1/2in. long overall.