In 1911, Heuer received a patent for the "Time of Trip", the first dashboard chronograph. Designed for use in automobiles and aircraft, two large hands mounted from the center pinion indicate the time of day, as on a traditional clock. A small pair of hands, mounted at the top of the dial (12 o'clock position) indicates the duration of the trip (up to 12 hours). A top-mounted crown allows the user to set the time; a button mounted in that crown operates the start/stop/reset functions of the "duration of trip" counter.
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