A tachometer designed to operate by harmonic action of a reed(s).
NSN 5975-01-435-3391
NSN 5945-00-404-8961
NSN 2925-01-016-0876
NSN 5855-01-381-7493
NSN 6685-01-316-4495
NSN 5925-01-512-8731
NSN 6620-00-067-4946
NSN 5990-00-167-2692
NSN 2925-01-153-7794
NSN 5930-01-323-4579
NSN 5905-00-729-1525
NSN 5950-01-211-0138