Flintlock pistol combined with a key for prison guards

Large key with flint lock, the shank of the key also serves as a 9 mm barrel. Probably Germany, 18th century, length 18 cm. Condition 2

Large key with flint lock, the shank of the key also serves as a 9 mm barrel. Probably Germany, 18th century, length 18 cm. Condition 2, Large key digs with flintlock, the key stem is used at the same time as barrel in cal. 9 mm. Probably Germany, 18th century, length 18 cm. Condition 2