No other part numbers with same form, fit, and function found.
A tachometer using solid state and/or vacuum tube circuitry.
NSN 5985-01-444-3312
NSN 5990-01-196-1585
NSN 5999-01-279-9827
NSN 5990-00-625-2560
NSN 5905-01-263-9250
NSN 6105-01-605-1447
NSN 5996-01-449-0666
NSN 5855-01-466-8027
NSN 2925-01-556-0333
NSN 6130-01-485-5022
NSN 2925-00-516-8841
NSN 5960-01-485-2467