An item designed to count the number of ships passing over an underwater mine. It is set to allow detonation after a predetermined number of ships have passed.
Classification: Parts for bombs, grenades, torpedos, mines, and similar munitions of war
NSN 6110-01-359-2743
NSN 5855-01-088-8700
NSN 5855-01-199-2046
NSN 5985-01-386-1170
NSN 5965-01-399-8454
NSN 5998-00-824-4143
NSN 5925-01-204-9441
NSN 5950-01-271-7367
NSN 2925-00-450-7783
NSN 4140-00-848-8465
NSN 5985-01-415-0274
NSN 2925-01-194-2484