Stopwatch, Type A-8, Navigation Watch for Ground Speed 1942 "Jitterbug" F-89 See photo of spec sheet

See photo of spec sheet and the B-25 instrument panel showing the location of the indicator

inspection

It has an overhaul stamp on the rear case from Naval Air Station Penscacola (FL) dated Aug 1959

a very small black index pointer travels along the perimeter of the dial between 350-530 knots setting the mach limit between 0

Made by Swedish high-end leather goods specialty manufacturer

Stopwatch, Type A-8, Navigation Watch for Ground Speed 1942 "Jitterbug" F-89 See photo of spec sheetHere is an authentic WWII era aircraft navigator's Watch, Navigation (Ground Speed) Stopwatch, Type A 8, made by Elgin to Air Corps US Army spec #94 27749. With a serial # AC42 670, indicating manufacturing year of 1942. Type A 8 stopwatches were used in any WWII aircraft with a navigator, such as heavy (B 17, B 24, B 29) and medium bombers (B 25, B 26) and large transports (C 46, C 47, C 54). The outer ring of the dial counts up to 10 seconds and the