Switch, Pressure, No. 5 Mk I, Booby Trap, SOE-OSS

Rare genuine WWII British No. Mk I pressure switch, intended for setting booby traps.

Designed for the Special Operations Executive, this single-spring type was intended for triggering the detonator attached to the charge when applying a pressure between 21 and 50 pounds.

Good overall condition. No fuse adapter.