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A watch containing the Chronograph complication includes a stopwatch function. A Chronograph both measures and displays elapsed times in addition to showing conventional time. Usually, the chronograph mechanism is driven by the movement of the watch and operated by two buttons on the edge of the case which start, stop and reset the chronograph. Usually the chronograph seconds hand is the large centre seconds with sub-dials for elapsed minutes and hours - although the exact display may vary.
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