Key pistol with system with percussion, one shot,... Lot 24

Key pistol with system with percussion, one shot, calibre 9 mm Iron ring protecting the hammer with two squared grips and the spring. Rod being used as barrel, with overflowing boss. Bit with two rakes with grooved boards. Trigger grooved, lodged on the back of the ring. Beautiful piece of locksmithing struck on the ring and the hammer "036". Length : 18,4 cm B.E. 19th century.