Timepiece (Stopwatch?), Japanese F4F Wildcat as used by single engine

as used by single engine aircraft of the Air Corps US Army

They introduced hard labor laws for the workers

The knobs are stiff but rotate

measured from full up at 0 degrees to 40 degrees fully extended downward

including heavy bombers B-17 Flying Fortress

Timepiece (Stopwatch?), Japanese F4F Wildcat as used by single engineHere 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