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 5930-01-546-9955
NSN 5925-01-093-3388
NSN 5855-01-505-5144
NSN 6135-01-033-5052
NSN 6620-01-383-1997
NSN 5965-01-655-0310
NSN 5855-01-364-1005
NSN 5999-00-134-0967
NSN 5990-00-912-6616
NSN 5950-00-905-5261
NSN 5985-01-335-8514
NSN 5945-01-528-6380