A tachometer using solid state and/or vacuum tube circuitry.
NSN 5855-00-925-0114
NSN 5925-01-004-2790
NSN 5920-00-485-3044
NSN 5930-01-168-7847
NSN 6610-01-646-9101
NSN 6240-00-145-8167
NSN 5895-01-158-3347
NSN 5960-01-641-5493
NSN 6110-01-189-3048
NSN 5996-01-117-6882
NSN 5999-01-416-7590
NSN 5945-01-476-7351