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  2. Numismatic Guaranty Company - Wikipedia

    en.wikipedia.org/wiki/Numismatic_Guaranty_Company

    Numismatic Guaranty Company (NGC) is an international third-party coin grading and certification service based in Sarasota, Florida. It has certified more than 60 million coins. NGC certification consists of authentication, grading, attribution, and encapsulation in clear plastic holders. NGC is a subsidiary of Certified Collectibles Group (CCG ...

  3. Mettler Toledo - Wikipedia

    en.wikipedia.org/wiki/Mettler_Toledo

    METTLER TOLEDO (NYSE: MTD) is a multinational leader in precision instruments and services. The company focuses on innovation and quality across laboratory, industrial, product inspection, and food retailing applications. Its products are used in research, quality control, and manufacturing processes in life sciences, food, chemical, and many ...

  4. ANACS (coin grading company) - Wikipedia

    en.wikipedia.org/wiki/ANACS_(coin_grading_company)

    Originally founded in June 1972 as the American Numismatic Association 's authentication service, ANACS expanded into third-party coin grading in March 1979. ANACS was founded in response to the rise in counterfeit and altered coins in the numismatic marketplace. During the coin collecting boom of the 1960s, counterfeiters would alter common ...

  5. Worthington Enterprises - Wikipedia

    en.wikipedia.org/wiki/Worthington_Enterprises

    Worthington Enterprises, Inc. is a global diversified metals manufacturing company based in Columbus, Ohio.It is a steel processor and manufacturer of pressure vessels, such as propane, oxygen and helium tanks, hand torches, refrigerant and industrial cylinders, camping cylinders, exploration, recovery and production products for global energy markets; water system tanks for storage, treatment ...

  6. Professional Coin Grading Service - Wikipedia

    en.wikipedia.org/wiki/Professional_Coin_Grading...

    Professional Coin Grading Service (PCGS) is an American third-party coin grading, authentication, attribution, and encapsulation service founded in 1985. The intent of its seven founding dealers, including the firm's former president David Hall, was to standardize grading. [4][5] The firm has divisions in Europe and Asia, and is owned by parent ...

  7. Wright Air Lines - Wikipedia

    en.wikipedia.org/wiki/Wright_Air_Lines

    TAG and Wright petitioned the CAB for certification to fly larger aircraft on DET-BKL. Since the advent of local service carriers in the late 1940s/early 1950s, only one small airline had been so certificated within the continental US, Aspen Airways , which received CAB certification for Denver-Aspen in 1967. [ 14 ]

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