No other part numbers with same form, fit, and function found.
A tachometer using solid state and/or vacuum tube circuitry.
NSN 6135-01-265-1384
NSN 5965-00-129-9779
NSN 6135-00-891-4944
NSN 5920-00-800-8998
NSN 5895-01-144-4734
NSN 5920-00-955-9392
NSN 6320-00-857-4073
NSN 5999-01-200-0704
NSN 6240-01-185-5538
NSN 5990-01-378-7349
NSN 6650-01-359-7887
NSN 5855-01-100-3272