No other part numbers with same form, fit, and function found.
A tachometer using solid state and/or vacuum tube circuitry.
NSN 6650-01-602-5070
NSN 4140-01-653-9368
NSN 5835-01-203-1871
NSN 5895-01-157-4006
NSN 6645-01-552-0004
NSN 5895-01-104-3125
NSN 6150-01-538-6045
NSN 5990-01-183-1897
NSN 6130-00-113-8291
NSN 5985-00-277-7371
NSN 5985-00-843-5050
NSN 7035-01-493-6389