The Hamilton/Elgin 37500 Aircraft Clock were produced by both The Hamilton Watch Co. and The Elgin National Watch Company in 1944/45.
Both companies were contracted to join forces and come up with a reliable Elapsed Time Clock for the U.S. Navy because Jaeger LeCoultre could not meet the demands and the result was the 37500. Many of these beautiful timepieces have survived due to the fact the United States had Air Superiority towards the end of the war. There is no difference between the Hamilton marked and Elgin marked clocks just the name on the back.
The 37500 came with a few different dial colors, the most common were the non Radium Fluorescent dial with Green and Yellow markings these gave off a Red Orange glow under UV light.These clocks have 416 parts to the complicated fine watch like movement.
Clocks were installed for Navigation and noted as a KEY instrument from the pilots that flew by them.Some of the more famous Aircraft were the F-4U Corsair and the F-6 Hellcat but the 37500 was found in many Naval Aircraft.