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2. 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 ...

3. Coin folder - Wikipedia

   en.wikipedia.org/wiki/Coin_folder

   Coin boards were a huge success as they offered collectors of all types a way to store their coins inexpensively. The modern day coin folder's invention is disputed by two major rivals. One take has that the folders were invented by R.S. Yeoman of The Whitman Company just before World War II .

4. Coin storage - Wikipedia

   en.wikipedia.org/wiki/Coin_storage

   An 1886-S Gold eagle in a PCGS plastic coin slab A 1/10th troy ounce American Gold Eagle in a cardboard '2x2' flip, secured with staples A coin folder offers no protection from the elements and is likely to damage coins when pressed in or popped out. Coin collectors have various options for storing their coin collections. The various options ...

5. Challenge coin - Wikipedia

   en.wikipedia.org/wiki/Challenge_coin

   The front of a U.S. Marine Corps birthday ball medallion Huguenot méreau used as a challenge coin during 17th century Protestant persecution in France. A challenge coin is a small coin or medallion, bearing an organization's insignia or emblem and carried by the organization's members. Traditionally, they might be given to prove membership ...

6. Obama caught in photos handing servicemen challenge coins ...

   www.aol.com/news/2014-05-21-obama-caught-in...

   The challenge coin was the first Charron had received from a president, a new highlight in a collection of approximately 250 coins he's amassed over his long military career.

7. Numismatic Guaranty Company - Wikipedia

   en.wikipedia.org/wiki/Numismatic_Guaranty_Company

   Since 2009, a scratch-resistant holder coating, similar to that used on eyeglass lenses, has been employed. NGC offers Oversize holders for coins larger than 45 mm and up to 120 mm, and Mega holders for coins larger than 120 mm and up to 180 mm. [12] NGC's label lists a coin's denomination, variety, grade, pedigree, serial number, and other info.