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The balance wheel is a weighted wheel that oscillates back and forth at a constant rate on a Marine chronometer used to determine longitude by means of accurately measuring the time for navigation.
stopwatch hold in hand, button pressed,monochromatic light blue background
Hand of caucasian young woman counting time using stopwatch over isolated white background
manual digital stopwatch isolated on white background. electronic meter, sport timer. modern time measurement technologies.
Time is running up, five minutes to twelve o'clock. Clocks falling down. Time concept.

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