A tachometer using solid state and/or vacuum tube circuitry.
NSN 5945-00-924-9595
NSN 5960-00-007-8263
NSN 6685-01-110-1783
NSN 4140-01-412-0403
NSN 6110-01-075-5354
NSN 5998-00-247-1059
NSN 2925-01-087-4184
NSN 2925-01-356-6017
NSN 5975-01-567-6981
NSN 5905-01-600-0179
NSN 6685-01-523-7894
NSN 6240-01-352-0882