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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.

3. Coin grading - Wikipedia

   en.wikipedia.org/wiki/Coin_grading

   Professional Coin Grading service (PCGS), Numismatic Guaranty Corporation (NGC), Independent Coin Graders (ICG), and American Numismatic Association Certification Service (ANACS) are the most popular services. These are the only services whose coins have a special section on eBay, the largest rare coin marketplace.

4. Third-party grading - Wikipedia

   en.wikipedia.org/wiki/Third-party_grading

   Third-party grading (TPG) refers to coin grading & banknote grading authentication, attribution, and encapsulation by independent certification services.. These services will, for a tiered fee depending on the value of the coin, "slab" a coin and assign a grade of 1–70 on the Sheldon grading system, with 1 being the lowest grade, with only faint details visible to 70, a practically perfect ...

5. Certified Acceptance Corporation - Wikipedia

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

   The firm evaluates certain numismatically valuable U.S. coins already certified by Numismatic Guaranty Corporation (NGC) or Professional Coin Grading Service (PCGS). [1] [2] Coins that CAC deems high-end for their grades receive green stickers, [3] which usually add premiums ranging from single digit percentages to 92% or more.

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.

7. Coin collecting - Wikipedia

   en.wikipedia.org/wiki/Coin_collecting

   Coin collecting is the collecting of coins or other forms of minted legal tender. Coins of interest to collectors include beautiful, rare, and historically significant pieces. Collectors may be interested, for example, in complete sets of a particular design or denomination, coins that were in circulation for only a brief time, or coins with ...

8. Coin slab - Wikipedia

   en.wikipedia.org/wiki/Coin_slab

   Coin slab is a type of holder for a coin. Slabbed coins are typically from one of the coin grading companies. The practice of sending coins to third-party grading companies and then "slabbing" them began in 1986. When a grading company grades the coin it is sealed in a tamper proof slab with a barcode and a hologram. To prevent counterfeiting ...

9. First strike (coinage) - Wikipedia

   en.wikipedia.org/wiki/First_strike_(coinage)

   The lawsuit was filed against the two coin grading companies: Numismatic Guaranty Corp., (NGC) based in Sarasota, Fla., and Professional Coin Grading Service, (PCGS) of Newport Beach, California. [4] In 2007 NGC settled the lawsuit by paying money to collectors and the attorneys. They also designated 447,500 dollars for consumer education. [5]