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NGC, NCS & PMG Named Official Grading and Conservation Services of Popular “Coin Dealers Helping Coin Dealers” Group

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Numismatic Guaranty Corporation® (NGC®) and Paper Money Guaranty® (PMG®) have been named the Official Grading Services of the popular Facebook group “Coin Dealers Helping Coin Dealers“, as well as Roundtable Trading, LLC, an affiliated dealer-to-dealer trading and informational platform. Numismatic Conservation Services® (NCS®), an affiliate of NGC and PMG, has been named the Official Conservation Service of both groups.

Coin Dealers Helping Coin Dealers is a private Facebook group for coin dealers and other industry professionals to conduct transactions and share information. It currently has almost 900 members, who are allowed to join only after a careful admission process. This group has had a significant impact on the wholesale coin market and is used by many of the country’s largest and most prestigious dealers.

Roundtable Trading, LLC extended the group’s objectives into an online platform where additional services could be offered. Both groups were founded and are operated by Rob Oberth, a longtime coin dealer.

NGC was founded in 1987 to provide expert and unbiased certification services for coins, tokens and medals. In 2005, PMG was formed to provide similar certification services for paper money. NGC and PMG, along with NCS—a professional coin conservation service—are independent members within the Certified Collectibles Group® (CCG®) of companies.

NGC has certified more than 42 million coins, while PMG has certified more than 3.5 million notes. NCS has conserved more than 1 million coins. Headquartered in Sarasota, Florida, USA, the companies have branch offices in Hong Kong, Shanghai, Munich and London, as well as a global network of Official Submission Centers, Strategic Partners and Authorized Dealers.

“NGC and PMG are highly trusted for their accurate and consistent grading, and NCS provide superior professional conservation services,” said Oberth. “We are honored to be associated with these industry-leading companies.”

“The professional coin and paper money dealers in Coin Dealers Helping Coin Dealers and Roundtable are some of the most dynamic, effective and well-known dealers,” said Mark Salzberg, Chairman of NGC, NCS and PMG. “NGC, NCS and PMG are proud to be their Official Grading and Conservation Services.”

NGC, NCS and PMG are also the Official Grading and Conservation Services of the American Numismatic Association (ANA), a coin collecting organization chartered by the US Congress, and the Professional Numismatists Guild (PNG), a respected dealer organization in the US. NGC, NCS and PMG were recently named the official grading and conservation services of the Macau Numismatic Society (MNS), which was established in 1988 to serve the coin and paper money collecting communities in that Chinese special administrative region. In April 2018, NGC was appointed the official grading service of the National Silver Dollar Roundtable (NSDR), which was founded in 1982 and counts some of the hobby’s top experts as members.

For more information on NGC, NCS and PMG, visit, and

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About Numismatic Guaranty Corporation® (NGC®)

NGC is the world’s largest and most trusted third-party grading service for coins, tokens and medals. Founded in 1987, NGC provides accurate, consistent and impartial assessments of authenticity and grade. To ensure impartiality, NGC does not buy or sell coins. Its full-time graders are prohibited from buying and selling coins commercially, and strict procedures are in place to prevent consultants from influencing the grades assigned to their own submissions. Every coin that NGC certifies is backed by the comprehensive NGC Guarantee of authenticity and grade, which has added confidence and value for collectors and dealers around the world. Learn more at

Numismatic Guaranty Company
Numismatic Guaranty Company
NGC was founded in 1987 and has become one of the largest third-party grading services. Their parent company is the Certified Collectibles Group (CCG).

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