My latest buy...absolutely mint pair of WW2 type A-2 release switches in the original box and bag with instruction manual as well.
Used for boobytrapping anything you dont want removed,underside of a mine,inside desk drawer(back removed of course...),under crates or boxes or even held neutral by a truck wheel etc etc
Hard to find in any condition and never seen ONE in good condition let alone a set.Click image for larger version. 

Name:	Type A-2 release switch.jpg 
Views:	48 
Size:	55.3 KB 
ID:	186728