A tachometer using solid state and/or vacuum tube circuitry.
NSN 5990-00-938-8617
NSN 2925-01-155-5444
NSN 5895-00-608-5815
NSN 6145-01-589-4198
NSN 5975-00-483-7266
NSN 5935-01-351-8387
NSN 5985-01-021-8395
NSN 5915-01-627-1666
NSN 5910-01-458-4441
NSN 5965-01-241-9865
NSN 5965-01-200-6613
NSN 5910-01-145-0297