Numismatic Guaranty Corporation
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| Private | |
| Industry | Collectibles |
| Founded | 1987, Parsippany, New Jersey |
| Headquarters | Sarasota, Florida |
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Area served
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Worldwide |
| Services | Coin certification |
| Parent | Certified Collectibles Group |
| Website | www.ngccoin.com |
Numismatic Guaranty Corporation (NGC) is a privately owned, international coin certification service based in Sarasota, Florida. It is the world's largest third-party coin certification service by volume, having certified more than 35 million coins. NGC certification consists of authentication, grading, attribution, and encapsulation in clear plastic holders. NGC is a member of Certified Collectibles Group (CCG), which owns five collectible certification services. NGC has been the official grading service of the American Numismatic Association (ANA) since 1995 and the Professional Numismatists Guild (PNG) since 2004.
NGC was founded in 1987 in Parsippany, N.J. as one of the first independent third-party coin grading companies. In 1995, NGC was named the official grading service of the ANA. NGC commenced operations at its new location in Sarasota, Florida in 2002. That same year, NGC was named the official grading service of the PNG. In 2006, NGC relocated to a 60,000-square-foot secure building that also houses its four CCG-owned sister companies: Numismatic Conservation Services (NCS), Paper Money Guaranty (PMG), Certified Guaranty Company (CGC), and Classic Collectible Services (CCS). In 2008, ancient coin certification began (NGC Ancients). NGC has opened satellite offices in Hong Kong, Shanghai, China, Zurich, Switzerland, and Munich, Germany, and submission centers in Guangzhou, China; Seoul, South Korea; Taipei City, Taiwan; Tokyo, Japan; and Singapore.
NGC certifies most US, world, and ancient coins, tokens, and medals. The certification process consists of authentication, grading, attribution, and encapsulation in plastic holders (aka slabs). Certification fees are tiered according to value, turnaround times, and extra services. NGC has certified over 35 million coins. NGC certification offers significant protection against counterfeiting, misattribution, overgrading, and damage, but does not necessarily determine exact value. Even within the same grade, coins can have widely differing values.
The NGC grading scale is based on the 70-point Sheldon coin grading scale. Strike designations include Prooflike and Deep Prooflike for circulation issue coins and Cameo and Ultra Cameo for Proof coins. Coins deemed high-end will receive a "Plus" designation. Coins considered attractive get a "Star" moniker. Cleaned, scratched, or otherwise impaired coins can be encapsulated and assigned a verbal "details" grade, but not a numerical one.
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