No other part numbers with same form, fit, and function found.
A tachometer using solid state and/or vacuum tube circuitry.
NSN 6620-01-341-5164
NSN 5965-00-594-3115
NSN 5835-01-027-1828
NSN 5990-00-113-2653
NSN 5996-00-609-7206
NSN 6240-01-268-0409
NSN 4140-01-536-9823
NSN 7035-01-438-2108
NSN 4140-01-379-0740
NSN 5935-00-068-7939
NSN 5999-01-060-6758
NSN 5910-01-496-4996