A tachometer using solid state and/or vacuum tube circuitry.
NSN 6685-01-254-7639
NSN 5990-00-779-8268
NSN 5990-01-565-2226
NSN 6685-01-512-2014
NSN 6150-01-372-6946
NSN 6105-00-089-6824
NSN 4140-01-130-7858
NSN 5935-01-422-2613
NSN 6240-01-020-3440
NSN 6110-01-421-2091
NSN 5920-01-328-3146
NSN 5895-00-050-2044