No other part numbers with same form, fit, and function found.
A tachometer using solid state and/or vacuum tube circuitry.
NSN 6645-01-463-3024
NSN 5985-00-833-8063
NSN 6130-00-429-8089
NSN 5935-00-904-1592
NSN 6610-01-168-7943
NSN 6240-01-633-9357
NSN 5910-00-245-9578
NSN 5985-00-481-4903
NSN 6220-01-194-2963
NSN 5960-01-560-1958
NSN 5835-01-027-0210
NSN 6145-01-182-1491