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History of Chronometers

History of Chronometers Pt. 4: In-House and Beyond COSC

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Since 1972, the Contrôle Officiel Suisse des Chronomètres, or COSC, has been the official Swiss …

History of Chronometers Pt. 3: Enter COSC

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As the ‘60s drew to a close and gave way to the early 1970s, the traditional Swiss industry was erupting into full-blown crisis. While the …

History of Chronometers Pt. 2: Observatory Trials

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John Harrison’s innovations in marine chronometry quickly took the world by storm. By the 1850s, marine chronometer watches were essentially standard equipment on oceangoing vessels …
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History of Chronometers Pt. 1: Origins

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Most categories of watches are rather self-explanatory. A diver watch is built to go underwater, a moonphase displays the current phase of the moon, and …