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 5905-01-356-0035
NSN 6220-01-556-7164
NSN 5998-01-012-4204
NSN 5960-01-457-0157
NSN 6685-01-413-6487
NSN 5935-00-288-5973
NSN 5910-01-509-7783
NSN 6610-00-420-6826
NSN 6135-01-450-1269
NSN 5930-01-521-4163
NSN 5930-01-659-0421
NSN 6105-01-440-1558