A tachometer designed to operate by harmonic action of a reed(s).
NSN 6105-00-826-3432
NSN 5905-01-023-1732
NSN 6320-00-779-5923
NSN 6610-01-027-1641
NSN 5998-00-924-5816
NSN 6650-00-078-5773
NSN 5960-00-869-7404
NSN 6240-00-853-3576
NSN 5920-01-285-0391
NSN 7035-01-615-8055
NSN 5935-01-015-8808
NSN 5920-00-913-3728