No other part numbers with same form, fit, and function found.
A tachometer using solid state and/or vacuum tube circuitry.
NSN 5835-01-495-5986
NSN 5990-01-054-3332
NSN 5950-00-900-3873
NSN 5999-01-209-3686
NSN 7035-01-076-4067
NSN 5999-01-173-7750
NSN 6240-00-185-8367
NSN 6610-00-119-2839
NSN 6105-01-630-2239
NSN 5960-00-243-9155
NSN 6620-01-097-1038
NSN 6610-00-794-1719