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    Re: Longines A-7 Avigation Hack Watch
    From: Eitan A
    Date: 2017 Sep 21, 10:16 -0700

    Hi Geoffrey, it would be interesting to know where the derivation comes from. Primarily I have found it used for aviator watches, but I don't know if they took the term from Naval watches.

    “Weems demonstrated several of his innovations to Lindbergh, including a bubble sextant that he was helping the National Bureau of Standards to improve, and his prototype Second-Setting Watch: the first true aviator “hack” watch that could be set precisely to the second. (Later, the military realized a major benefit of this precision, and began to synchronize multiple watches for field operations, thus making famous the line “Gentleman, synchronize your watches.”)”

    http://www.airspacemag.com/history-of-flight/even-lindbergh-got-lost-3381643/?all

    https://airandspace.si.edu/multimedia-gallery/4207hjpg

       
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