John Kindred
Member

I had a feeling there was a query some time ago, about a Booby Trap Switch. At the time I didn't recognise it but I believe it was the same as the attached photo.
This is the Mk II version of the Australian designed Switch Booby Trap (Murray) Mk I, also called the Switch Combination (Aust.) Mk I
The retaining cap is missing from this photo which is courtesy of the Australian War Memorial.