This comprehensive guide to chronographs covers history, important terms to know, and the best models available at any price.

Watches are passive devices. Once you’ve set the time, you can sit back, relax and let it do its thing. This is even true in the world of complications — additional functions in addition to the time — in which calendars, moon phase indicators and GMTs all, essentially, count a continually elapsing event. Save for one: the chronograph.
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