A tachometer designed to operate by harmonic action of a reed(s).
NSN 6105-00-227-1412
NSN 5930-01-274-6570
NSN 5895-00-918-7783
NSN 2925-01-446-6976
NSN 5835-01-498-9410
NSN 5855-01-513-9601
NSN 2925-01-166-3228
NSN 5910-00-100-1496
NSN 5965-01-063-7894
NSN 6645-01-024-0409
NSN 6105-01-024-9425
NSN 6685-01-062-0900