British No.6 Mk I Release Pressure Switch – SOE/OSS Booby Trap Device Books engraved “Krieger-Verein Windhuk 1

engraved “Krieger-Verein Windhuk 1

MK 11 oil bottle broad arrow marked

This example appears to be a Recce-style copy or locally produced variant inspired by Cuban military issue

groundsheet

and design characteristics

British No.6 Mk I Release Pressure Switch – SOE/OSS Booby Trap Device Books engraved “Krieger-Verein Windhuk 1An original WWII British No. 6 Mk I release switch designed for booby trap, sabotage, and clandestine demolition work, widely issued to Special Operations Executive (SOE), Office of Strategic Services (OSS), British Commando, and sabotage teams. This device operates as both a pressure and release switch. When armed, tension on the trip wire keeps the striker compressed; removal of tension or release of pressure triggers the striker, which then ignites