The photos below show a "Manipulier" fuze, which is a training device.
The original "live" fuze could be used for several different mines and also for boobytraps.
Its safetycap needed to be screwed upwards to reveal the safetypin which could be pulled out.
The fuze could be initiated by 10.5kilo pressure, or by pressure from the side.
The retaining balls needed only a movement of 1.5mm to release the pre-cocked striker.
Length : 82mm
Diameter : 40mm
Photos © M. Jochoms.