No other part numbers with same form, fit, and function found.
A tachometer using solid state and/or vacuum tube circuitry.
NSN 5925-01-374-1574
NSN 6135-01-273-1253
NSN 6110-01-363-3920
NSN 5930-01-087-8160
NSN 5945-01-275-0818
NSN 5990-01-168-6797
NSN 5910-01-413-5087
NSN 5925-01-548-7748
NSN 6110-00-177-8755
NSN 5925-00-824-9649
NSN 5930-01-493-8932
NSN 5996-01-231-4361