Two or more different items having a common mounting or mounted on each other which together form a portion of a tachometer (as modified), but which in itself is not a complete functioning item and cannot be assigned a more definite item name.
NSN 5998-01-171-1795
NSN 5975-01-334-7753
NSN 5965-01-225-6080
NSN 5999-01-507-1179
NSN 5920-00-138-5241
NSN 6145-00-455-2809
NSN 5935-01-446-0564
NSN 4140-01-563-4940
NSN 6145-01-584-8979
NSN 6105-01-331-9022
NSN 6645-01-249-7209
NSN 4140-01-555-8190