国内大手精密素材メーカー・栄光精工が文化財貨幣専用「無酸素密封ガラスケース」を量産化。アルゴン充填+極低酸素維持技術で100年保存を実現し、2026年6月より業務用・市販モデルを同時出荷。古銭業界の保存品質を抜本的に引き上げる。
技術・素材
Major Japanese Metal Processing Manufacturer Mass-Produces Oxygen-Free Glass Cases for Cultural Currency Preservation — Century-Proof Material Technology Raises Industry Preservation Standards
Source: 栄光精工 プレスリリース|Published: May 24, 202611d ago
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#技術・素材
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A reference when considering a sale or appraisal. All are dealers and auction houses with a proven track record.
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Ginza Coins
Ginza, Chuo-ku, Tokyo
One of Japan's most established numismatic dealers. The scale and variety of their regular auctions is among the largest in the country. Their catalogs are considered a benchmark for market pricing.
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Japan Coin Auction (JCA)
Tokyo
Holds regular auctions with reliable hammer price data, making it a useful resource for tracking market values. Caters to a wide range of collectors from beginners to advanced buyers.
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Taisei Coins
Tokyo
A dealer with an international network. Offers advanced services such as consignment to overseas auctions and NGC/PCGS grading submission. Recommended for high-value or internationally recognized coins.