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David R. Sear Ancient Coin Certification Service
Provides a valid attribution of their coins and confirmation of authenticity.
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Independent Coin Grading
Authenticates, grades and encapsulates problem coins, tokens and medals that qualify for any level of general coin grading service currently provided.
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National Coin Grading Service
Grading services for gold, silver, coins, certified U.S. coins, Morgan silver dollars, American silver eagles.
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National Numismatic Certification, LLC
An independent third-party coin grading service which does not buy or sell coins, nor appraise coins in terms of monetary value.
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Numismatic Conservation Services, LLC
Provides expert professional conservation services for public and private collections of coins, tokens and medals.
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Numismatic Guaranty Corporation
Offers coin grading services, coin certification, and services for coin dealers.
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NumisTrust Corporation
A fully insured, comprehensive coin grading service.
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Robert Matthews Coin Authentication
Offers a coin authentication service for british milled coins, examining coins and acting as an expert witness on counterfeit coins.