Tachometer, Sensitive, Electric, US Navy, 88-I-2385-100 AD Skyraider P-2 Neptune It is in terrific condition

It is in terrific condition for its age

part number 1784163-901

Likely from the 1960s

but perhaps not surprising for an artifact of its age

Tachometer, Sensitive, Electric, US Navy, 88-I-2385-100 AD Skyraider P-2 Neptune It is in terrific conditionThis is a 1950's era single engine, electrical, aircraft tachometer made by General Electric under contract for the US Navy, part number 8DJ57GAB, FSSC number 88 I 2385 100. This appears to be the type used in the Douglas Skyraider attack aircraft, models AD 2 and AD 3 (see photo of instrument panel from its flight manual dated 1950 showing the location of the tachometer). RPM in 100's is indicated on the outer scale. RPM in 1000's is indicated in the