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NUMISMATIC GUARANTY CORPORATION (NGC) is the world's leading and largest third-party grading company, having graded more than 42 million coins. Over the last 30 years NGC has graded many of the world's most important coins and collections, including pieces from the Smithsonian Institution, the national museum of the United States, and the Shanghai Mint Museum.  Collectors and dealers prefer NGC for its accuracy, consistency, and integrity. Coins that have been graded and authenticated by NGC are backed by the NGC Guarantee. Our graders are completely impartial and do not buy or sell coins commercially.


Professional Coin Grading Service (PCGS) represents the industry standard in third-party coin certification. By establishing a universal grading standard, PCGS has paved the way for coin enthusiasts to enjoy buying and selling coins with confidence.
The advent of the third-party, independent appraisal of a coin's physical condition (which is the basis of its grade), backed by the PCGS Guarantee, our world-class numismatic experts and our network of reputable authorized dealers, provides a dependable form of protection for rare coin collectors. Our respected grading standard has enabled PCGS-graded coins to realize record prices in the marketplace.
Since 1986, when PCGS began serving the coin-buying public, we have graded more than 30 million coins with a total market value of over 29 billion dollars (U.S.). PCGS standardized grading has forever changed the process of buying and selling coins, increasing confidence in buyers and sellers alike.

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Established in 1975, New Century Coins and Notesi s a renowned specialist in coins, banknotes and medals. We have been consultants on authenticity for official bodies such as the Hong Kong Museum of History.

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Trigometric was established in 2002 and is the largest and most trusted auctioneer of collectibles in Malaysia. It was the first large-scale collectibles trading auctioneer in the country, and is the organizer of the Kuala Lumpur International Numismatic Fair, the largest numismatic show in Malaysia.

Trigometric is widely recognized as the foremost expert in numismatics from Malaysia, with a focus on Malaysian currency. The company has published numerous reference materials and guides, including the 8th Edition of "The Malaysia, Brunei & Singapore, Banknotes & Coins Numismatic Reference," the 2nd Edition of "The Hong Kong & Macau, Banknotes & Coins Numismatic Reference," and "The World Uncut-Sheet Banknotes Numismatic Reference." These works are highly regarded in the numismatic community and are utilized by some of the largest third-party currency graders in the world, such as PMG and NGC.

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