Also called the Going Train. The series of wheels and pinions that transmit power from the mainspring to the escapement while, at the same time, driving the minutes and seconds hands (the hour hand is driven by the watch’s motion works). The first wheel in the wheel train is the mainspring barrel. The others are known as the center wheel, third wheel, fourth wheel and escape wheel. Each has an accompanying pinion that drives the next wheel in the train.
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