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 5855-01-578-1396
NSN 5990-01-426-7350
NSN 5905-01-227-5836
NSN 5965-01-368-6740
NSN 5998-00-661-0380
NSN 5895-01-037-5841
NSN 6240-00-081-6889
NSN 6650-00-367-9230
NSN 6240-01-347-5476
NSN 5999-01-160-4206
NSN 5965-01-151-0903
NSN 5925-01-146-5528