National Air and Space Museum Image Detail

Weems Watch

In 1927 Weems devised a watch with a settable second hand that could be easily corrected to the second using radio time signals. That made it more useful for air navigation than even precision maritime chronometers and was the beginning of the aviator's "hack" watch.

Image Number: WEB12524-2012
Credit: National Air and Space Museum, Smithsonian Institution
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