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Switch No. 5 Mk I
Booby Trap
Hardware available
The Switch Number 5 Mark I (Switch No. 5 Mk I) is an obsolete pressure firing device, originally developed by the British Special Operations Executive (SOE) during the Second World War (WWII). The American Office of Strategic Services (OSS) also produced copies of the Switch No. 5 Mk I, which were designated 'Firing Device, Pressure, Type A3'. Thought a WWII-era development, the Switch No. 5 Mk I was still in service with the British and Ca...
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