A tachometer using solid state and/or vacuum tube circuitry.
NSN 5930-01-250-3117
NSN 7035-01-113-1424
NSN 7035-00-173-2281
NSN 6145-00-445-7839
NSN 6610-01-366-8007
NSN 6110-01-164-8178
NSN 5905-01-109-4943
NSN 5990-01-449-7090
NSN 6105-00-205-0655
NSN 5895-01-178-6402
NSN 5895-01-648-4947
NSN 6610-01-160-3770