Aircraft Clock, Elapsed Time, Elgin, Cold War F9F, FJ-2 TBM Avenger indicating RPM for the rotor

indicating RPM for the rotor on the inner scale and rotor for the outer scale with a ratio of 9

The chronometric tachometer was connected mechanically and directly to the engine via flexible cable shaft

This is a vintage Cold-War-era Bomb Bay Tank Fuel Quantity Indicator

made by Manning Maxwell & Moore

The AN-104 is designed for 100 to 156 MHz

Aircraft Clock, Elapsed Time, Elgin, Cold War F9F, FJ-2 TBM Avenger indicating RPM for the rotorThis is an original Cold War era Elapsed Time Clock, made for the Bureau of Aeronautics of the US Navy by Elgin (part number 2137, stock number R88 C 574), as used in aircraft carrier based Grumman Cougar F9F 5 and North American Fury FJ2 Jet Fighters. See photo of the cockpit of the F9F 5 from its flight manual dated 1955, showing the location of the clock. The clock winds and keeps time. The reset mechanism does not reset, so it could use repair.