A tachometer designed to operate by harmonic action of a reed(s).
NSN 2925-01-541-5031
NSN 5998-01-322-4850
NSN 4140-01-074-6262
NSN 6105-01-268-5146
NSN 4140-00-091-0869
NSN 5905-01-446-4017
NSN 6620-00-325-4693
NSN 6145-01-469-2074
NSN 6685-01-654-8070
NSN 2925-01-603-6379
NSN 5910-00-686-9176
NSN 5935-01-364-6934