{"product_id":"stopwatch-type-a-8-navigation-watch-for-parts-or-repair-1944-jitterbug","title":"Stopwatch, Type A-8, Navigation Watch for Parts or Repair 1944 \"Jitterbug\"","description":"\u003cp\u003eHere is an authentic WWII-era aircraft navigator's Watch, Navigation (Ground Speed) Stopwatch, Type A-8, made by Waltham. With a serial # prefix AC44, indicating manufacturing year of 1944.  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). \u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eThis is offered for parts or repair as the crown and winding stem are missing\u003c\/strong\u003e\u003c\/span\u003e.\u003c\/p\u003e\n\u003cp\u003eThe outer ring of the dial counts up to 10 seconds and the inner dial located at the standard 12:00 position count up to 10 minutes of the 10-second revolutions. The A-8 was known as the ‘jitterbug’ because of the loud and fast ticking of the balance at 144,000 beats per hour.  \u003c\/p\u003e\n\u003cp\u003eAccording to C.G. Sweeting’s book \"Combat Flying Equipment\":\u003c\/p\u003e\n\u003cp style=\"padding-left: 30px;\"\u003e\u003cem\u003e 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 Waltham watches produced from 1940 onwards. Elgin produced a Type A-8, 15 jewel, black dial stopwatch under military specification no. 27749. Waltham, the Federal Television Corp. and Aristo Import Co. manufactured Type A-8 stopwatches under military specification MIL-W-6510 (specification published in August 1951 and superseded No. 94-27749A published in July 1945). Under MIL-W-6510, continuous running movements were required to have not less than 15 jewels and the non-continuous movements were required to have not less than 9 jewels.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Waltham","offers":[{"title":"Default Title","offer_id":67754114253088,"sku":"nxe1791923031634","price":32.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1003\/7054\/6976\/files\/stopwatch-type-a-8-navigation-watch-for-parts-or-repair-1944-jitterbug_1.jpg?v=1791923037","url":"https:\/\/dailystylestore.shop\/products\/stopwatch-type-a-8-navigation-watch-for-parts-or-repair-1944-jitterbug","provider":"My Store","version":"1.0","type":"link"}