No other part numbers with same form, fit, and function found.
A tachometer using solid state and/or vacuum tube circuitry.
NSN 6320-01-481-7322
NSN 6320-01-116-3980
NSN 6650-01-159-0224
NSN 6320-01-172-6103
NSN 5935-01-157-9385
NSN 5910-00-442-5554
NSN 5960-00-249-9623
NSN 6320-01-578-6006
NSN 6220-01-547-3058
NSN 6150-01-414-5613
NSN 6610-01-352-5500
NSN 5855-01-447-4097