Original U.S. WWII Named 1944 Army Air Forces B-17 Navigator Type A-8 Jitterbug Stopwatch by Elgin Antique Cartridge Firearms There is also an FM

There is also an FM inspector cartouche stamped into the stock on the left side behind the lower lock screw

The chin strap  is missing (common) but all other strap including the strap that secures the three flaps together are present

Steel reinforced tube construction measures 5 1/2" x 44" with sealing screw cap and carry handle

and likely ended in or around 1878 with the introduction of the 2nd model

000 Jeeps and Ford some 280

Original U.S. WWII Named 1944 Army Air Forces B-17 Navigator Type A-8 Jitterbug Stopwatch by Elgin Antique Cartridge Firearms There is also an FMOriginal Item: Only One Available. The Type A 8 was a navigation stopwatch designed for timing ground speed meters for determining the velocity of aircraft relative to the ground. One revolution of the Type A 8 hand was equivalent to ten seconds. The dial was white on early Wittnauer Type A 8 watches and black on Elgin watches produced from 1940 onward. Elgin, Waltham, the Federal Television Corp. and Aristo Import Co. manufactured Type A 8