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2. Certified Acceptance Corporation - Wikipedia

   en.wikipedia.org/wiki/Certified_Acceptance...

   In 2011, CAC and a group of coin dealers founded Coinplex, an online coin trading platform for dealers, in order to broaden the trading market for CAC-approved coins. The firm has since changed its name to CDN Exchange, [8] whose dealers are also able to make markets in non-CAC certified coins. CDN Exchange has over 180 member dealers posting ...

3. 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.

4. 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.

5. List of bullion dealers - Wikipedia

   en.wikipedia.org/wiki/List_of_bullion_dealers

   This list of bullion dealers includes notable companies and organizations that deal in precious metals, such as gold and silver. This list is incomplete ; you can help by adding missing items . ( September 2014 )

6. Coin grading - Wikipedia

   en.wikipedia.org/wiki/Coin_grading

   In 2007, the Professional Numismatists Guild (PNG), a US association of rare coin dealers, released the results of a survey of major coin dealers who gave their professional opinions about 11 certification services. PCGS and NGC were rated "Superior" overall, with ANACS and ICG deemed "Good".

7. ANACS (coin grading company) - Wikipedia

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

   During the coin collecting boom of the 1960s, counterfeiters would alter common-date coins, and either add or remove a mintmark in order to sell the coins as their more-valuable counterparts. (For example, an 'S' mint mark would be added to a 1909 VDB Lincoln cent in order to increase the coin's value by making collectors think it was a genuine ...