No other part numbers with same form, fit, and function found.
A tachometer using solid state and/or vacuum tube circuitry.
NSN 6145-01-066-2523
NSN 5965-00-661-0469
NSN 6650-01-460-0330
NSN 5965-01-423-5159
NSN 2925-00-433-5429
NSN 2925-00-964-7128
NSN 6620-00-905-6590
NSN 2925-00-347-7893
NSN 5930-01-587-1383
NSN 6620-01-122-8886
NSN 5920-01-524-9564
NSN 6150-01-051-1678