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Coin grading. Coin grading[1] is the process of determining the grade or condition of a coin, one of the key factors in determining its collectible value. A coin's grade is generally determined by six criteria: strike, preservation, luster, color, attractiveness, and occasionally the country/state in which it was minted.
Proof coins. Like circulated grades, proof coins are graded on the Sheldon scale from 1 to 70, and are preceded by the abbreviation ‘PF’ or ‘PR’ to distinguish them from circulation strikes. Proof coins graded 60 to 70 are mirrored to those of Uncirculated grades with the difference that the coin was not made for circulation.
A homogeneous mixture of two or more chemical elements, where the resulting compound has metallic properties. Common coin alloys include cupro-nickel (copper and nickel) and bronze (copper and tin). altered date. A false date put on a coin to defraud collectors, usually to make it appear more valuable.
Numismatic Guaranty Company (NGC) is an international third-party coin grading and certification service based in Sarasota, Florida. It has certified more than 60 million coins. NGC certification consists of authentication, grading, attribution, and encapsulation in clear plastic holders. NGC is a subsidiary of Certified Collectibles Group (CCG ...
Proof coinage refers to special early samples of a coin issue, historically made for checking the dies (as in demonstrating that something is true) and for archival purposes. In modern times, proofs are often struck in greater numbers, especially for coin collectors (numismatists). [1] Nearly all countries have issued proof coinage.
International Coin Certification Service (ICCS) is a Canadian third-party coin certification company located in Toronto, Ontario. [1][2] ICCS certification consists of grading, authentication, grade qualification, variety attribution, and other determinations. ICCS grades most world coins but is particularly known for grading Canadian dollars. [3]
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