◆ドイツ口腔インプラント学会・指導医( 旧：国際口腔インプラント学会・指導医 )
◆日本歯科レーザー学会認定医
◆日本口腔インプラント学会会員
◆日本再生歯科医学会会員
【 略歴 】
1969年生まれ
日本歯科大学新潟歯学部卒
新潟大学歯学部付属病院にて臨床研修後同大学第一保存学教室に入局、岩久教授の下で３Mix-mp法を学ぶ
2002年 医療法人社団伸整会に勤務
2006年 ドイツフライブルグ大学口腔外科にてインプラントアドバンスサージカルコース修了
2010年 ドイツ口腔インプラント学会・指導医取得
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Brands that manufacture chronometer watches
Understanding COSC Accreditation and Its Importance in Horology
COSC Validation and its Stringent Criteria
COSC, or the Controle Officiel Suisse des Chronometres, is the authorized Switzerland testing agency that attests to the precision and accuracy of wristwatches. COSC validation is a symbol of quality craftsmanship and reliability in timekeeping. Not all watch brands follow COSC certification, such as Hublot, which instead adheres to its own stringent criteria with mechanisms like the UNICO, reaching similar precision.
The Art of Precision Timekeeping
The central system of a mechanical watch involves the mainspring, which provides power as it loosens. This mechanism, however, can be prone to external elements that may affect its precision. COSC-certified movements undergo demanding testing—over fifteen days in various circumstances (five positions, three temperatures)—to ensure their resilience and reliability. The tests measure:
Mean daily rate accuracy between -4 and +6 seconds.
Mean variation, highest variation levels, and impacts of thermal variations.
Why COSC Validation Is Important
For watch enthusiasts and connoisseurs, a COSC-certified timepiece isn’t just a piece of tech but a proof to enduring excellence and accuracy. It symbolizes a watch that:
Provides excellent reliability and accuracy.
Ensures confidence of quality across the entire construction of the timepiece.
Is apt to maintain its value more effectively, making it a wise investment.
Popular Chronometer Brands
Several well-known brands prioritize COSC certification for their watches, including Rolex, Omega, Breitling, and Longines, among others. Longines, for instance, presents collections like the Archive and Spirit, which feature COSC-validated movements equipped with innovative materials like silicon equilibrium suspensions to improve resilience and performance.
Historic Context and the Evolution of Timepieces
The idea of the chronometer originates back to the requirement for accurate timekeeping for navigational at sea, emphasized by John Harrison’s work in the 18th century. Since the formal establishment of Controle Officiel Suisse des Chronometres in 1973, the certification has become a yardstick for assessing the precision of high-end watches, sustaining a legacy of superiority in horology.
Conclusion
Owning a COSC-accredited timepiece is more than an aesthetic selection; it’s a commitment to excellence and precision. For those appreciating accuracy above all, the COSC certification offers tranquility of thoughts, ensuring that each certified timepiece will operate reliably under various conditions. Whether for individual contentment or as an investment decision, COSC-certified watches stand out in the world of watchmaking, maintaining on a legacy of careful timekeeping.
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