WW2 SOE No.9 MkI Time Delay Switch

Switch No. 9. aka Lead Break or L-Delay. This switch is made up of a percussion cap and a spring-loaded striker held under tension by a thin strip of lead, contained within a metal tube. The striker would be held in place by a safety pin until the switch was ready to be used. A detonator or length of detonating cord would then be attached to the tube next to the percussion cap and the safety pin removed. Over time the lead strip would stretch and finally break, releasing the striker.

Code: 51433