本日はJASIPA PR委員会＋理事会＋ミニ交流会

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JASIPAネタ

本日はJASIPA行事が目白押し。14時からPR委員会、理事会、ミニ交流会と続くのであった。

ちなみに目白押しとは、スズメ目メジロ科の鳥「メジロ」が語源とのこと。メジロは群れをなして木に止まる習性があり、転じて「ものごとが連なる」「人が混みあって押し合う」という使い方をされるようになった。

←50円切手でもおなじみメジロ。本当に目が白い。英名はJapanese White-Eye。

159件のコメント

  153. PBN sites
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  159. Rolex watches
    Understanding COSC Validation and Its Importance in Horology
    COSC Validation and its Demanding Criteria
    Controle Officiel Suisse des Chronometres, or the Controle Officiel Suisse des Chronometres, is the official Swiss testing agency that certifies the precision and accuracy of timepieces. COSC accreditation is a symbol of superior craftsmanship and reliability in chronometry. Not all timepiece brands follow COSC certification, such as Hublot, which instead sticks to its own stringent standards with mechanisms like the UNICO calibre, achieving comparable precision.

    The Art of Precision Timekeeping
    The central system of a mechanized timepiece involves the mainspring, which delivers energy as it loosens. This mechanism, however, can be vulnerable to environmental factors that may impact its accuracy. COSC-accredited mechanisms undergo strict testing—over fifteen days in various circumstances (five positions, three temperatures)—to ensure their resilience and reliability. The tests measure:

    Mean daily rate precision between -4 and +6 secs.
    Mean variation, peak variation rates, and effects of temperature variations.
    Why COSC Certification Matters
    For watch aficionados and collectors, a COSC-validated timepiece isn’t just a item of tech but a demonstration to lasting excellence and precision. It signifies a timepiece that:

    Provides outstanding reliability and accuracy.
    Ensures confidence of superiority across the whole construction of the timepiece.
    Is likely to maintain its worth more effectively, making it a wise choice.
    Popular Chronometer Brands
    Several well-known manufacturers prioritize COSC validation for their watches, including Rolex, Omega, Breitling, and Longines, among others. Longines, for instance, presents collections like the Record and Soul, which highlight COSC-certified movements equipped with innovative materials like silicone equilibrium suspensions to boost resilience and efficiency.

    Historic Context and the Evolution of Chronometers
    The idea of the timepiece dates back to the need for precise timekeeping for navigation at sea, highlighted by John Harrison’s work in the 18th century. Since the formal establishment of COSC in 1973, the validation has become a yardstick for assessing the precision of luxury timepieces, continuing a legacy of excellence in watchmaking.

    Conclusion
    Owning a COSC-accredited watch is more than an aesthetic selection; it’s a commitment to excellence and accuracy. For those appreciating precision above all, the COSC certification offers peace of thoughts, guaranteeing that each accredited timepiece will operate reliably under various circumstances. Whether for personal satisfaction or as an investment, COSC-accredited watches distinguish themselves in the world of watchmaking, carrying on a legacy of meticulous timekeeping.

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