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Certification
Four types
The chronometer
Methods of measurement
Mechanical movements
Quartz movements
Watch heads
Certification requirements
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Exclusively Swiss watchmaking
Swiss made – a controlled label
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SAS Accreditation
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COSC past and present
Cutting-edge technology
The COSC today
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The COSC
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Under construction! Thank you for your understanding and your patience.
Le certificateur COSC ouvre un bureau à Saint-Imier
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