Timepiece (Stopwatch?), Japanese F4F Wildcat many of the aircraft in

many of the aircraft in the photos were captured and then marked with US roundels to hopefully prevent them from being shot down by friendly forces while undergoing flight tests

including heavy bombers B-17 Flying Fortress

including the P-47N Thunderbolt Fighter (see photo of the right side panel of the cockpit indicating the location of the switch box)

which is then rotated to select the expected lighting condition when the targets will be encountered

This 47 page document was the result of the specific survey assessing the atomic bomb attacks

Timepiece (Stopwatch?), Japanese F4F Wildcat many of the aircraft inHere is a highly unusual Japanese timepiece that is assumed to be military and WWII era. We speculate that it may have been either an aircraft navigator's timepiece or that of an artilleryman. The main dial measures time, assuming to be in seconds (since it does not run), with one rotation from 0 to 100. The bottom left dial is labeled with the Japanese character for "Hundreds", and the right dial is labeled with the Japanese character for