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w&w Instagram Round-Up #47

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It’s Saturday. That means it’s time for our Instagram roundup featuring some of our favorite …

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 regulatory body for chronometers, providing testing and certifications to much …