Aircraft Clock, Jaeger LeCoultre A-10 Chronoflite Elapsed Time Chronograph, US Navy Nick Fighter and the data label shows

and the data label shows a serial number prefix of AC 42

One of the 3 metal feet is damaged (see photo)

5 x 11 inch manual is in reasonable condition given its age

and some of it has chipped from its pointer (the chips are under the glass

This is a front left auxiliary cockpit window installed in some G-model B-17's

Aircraft Clock, Jaeger LeCoultre A-10 Chronoflite Elapsed Time Chronograph, US Navy Nick Fighter and the data label showsThis is a WWII era 24 hour 8 Day Aircraft Clock, USN stock number R88 C 570 10, made by Jaeger for use in aircraft of the US Navy, such as the PBY Catalina, TBM Avenger, and F4U Corsair. Known as the Jaeger LeCoultre A 10 Chronoflite Elapsed Time Clock, this version has the functions of Elapsed Time, Center Seconds Chronograph, and Civil Date Function. A colleague offers this explanation of its operation: The button on the right starts the large