Discover how the oscillating pinion and the column-wheel work together Eduard Heuer was the inventor of the oscillating pinion, a key component in the construction of many chronograph movements and, in particular, the component that lies at the center of the system for starting and stopping of the chronograph. We will sit with one of the movement designers of this year’s TAG Heuer 01 chronograph at Tag Heuer’s headquarters in La Chaux-de-Fonds, Switzerland. He will show us how chronographs start and stop, leading us through the chain of events from the moment the chronograph start button is pushed, through the turning of the column-wheel, to the connecting rockers and finally the change of position of the oscillating pinion.

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