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What Is a Chronometer Watch? The Official COSC Certification Standard Explained
The term "chronometer" is one of the most misused words in watchmaking. You'll see it printed on dials from budget fashion brands to Swiss maisons β but what does it actually mean, and what does it take to earn it officially? The Correct Definition "Chronometer" is a colloquial term. The precise technical designation, as defined by international standard ISO 3159, is: "a precision watch... -
Watch Quality Testing: How Swiss Timepieces Are Evaluated
Watch quality testing covers four key areas: functional testing, performance testing (including daily rate, temperature coefficient, positional error and isochronism), environmental testing, and power reserve testing. -
The QF Certification: Switzerland's Answer to the Geneva Seal
The QualitΓ© Fleurier (QF) certification, established in 2004 by Chopard, Bovet and Parmigiani, is one of Switzerland's most rigorous whole-watch quality standards β covering precision, movement finishing, and real-world wear simulation.
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