British No4 Mark I* Signal Pistol

British No4 Mark I* single shot, break open signal pistol. The barrel has four rectangular lugs near the muzzle for locking into the fuselage of an aircraft and it is stamped SMNo4MkI*1944 on the left side. The brass top release catch doubles as a locking clip for the aircraft mount and breech lock. It has the manufacturers mark of TSM&Co Ltd in a circle with 12 in the centre. The hammer has a safety pin on the left side of the frame that has to be pushed before the double action trigger can be pulled. The grips are two piece black checkered plastic and the butt has a provision for a lanyard loop.

This type of signal pistol was designed for use in British aircraft.