No other part numbers with same form, fit, and function found.
A tachometer using solid state and/or vacuum tube circuitry.
NSN 4140-01-388-2007
NSN 5996-00-886-3535
NSN 4140-01-381-3221
NSN 6320-00-322-3460
NSN 6610-00-764-4015
NSN 6135-01-571-0845
NSN 6105-00-807-0713
NSN 5855-00-058-1293
NSN 5925-01-061-9717
NSN 6145-01-509-1851
NSN 5935-01-145-4944
NSN 6110-01-447-2770