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    Longines A-7 Avigation Hack Watch
    From: Eitan A
    Date: 2017 Sep 20, 08:05 -0700

    Hi - I'm doing research into the A-7 timepiece produced by Longines and Meylan for the US Army in the 1930's.

    I wondered if anyone here would be able to point me to a copy of the Military Specs Document for this watch,

    I believe it is reference "27748", but not a hundred percent sure.

    Also if anyone here would be able to help me understand how the watch was used for navigation.

    Thanks - Eitan

       
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