A tachometer using solid state and/or vacuum tube circuitry.
NSN 6685-01-537-3208
NSN 5998-00-126-9470
NSN 6145-00-185-4515
NSN 5910-00-601-6404
NSN 5935-01-003-8602
NSN 4140-01-138-0099
NSN 5895-01-415-0218
NSN 5895-01-469-7402
NSN 5975-01-187-9207
NSN 6650-01-435-1168
NSN 5975-01-265-0686
NSN 6110-00-905-6148