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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.
Coin slab is a type of holder for a coin. Slabbed coins are typically from one of the coin grading companies. The practice of sending coins to third-party grading companies and then "slabbing" them began in 1986. When a grading company grades the coin it is sealed in a tamper proof slab with a barcode and a hologram. To prevent counterfeiting ...
The rest of the NGC coin series were presented on March 26, 2018. [11] The rest of the series was released March 2018 consisting of 1, 5 and 25-sentimo and 1, 5 and 10-piso. A 20-peso coin was added to the series on December 17, 2019, in order to replace the overused 20-piso banknote with a coin that could last 10–15 years longer in ...
The ₱20 coin received its final designs in the same month and the two coins will be released for circulation in December 2019. The 5-piso coin will have a nonagonal shape. The 20-piso coin will be bimetallic. The 20-piso coin will be the second bimetallic coin in circulation after the 10-piso coin of the New Design/BSP series. In 2020, the ...
The firm evaluates certain numismatically valuable U.S. coins already certified by Numismatic Guaranty Corporation (NGC) or Professional Coin Grading Service (PCGS). [1] [2] Coins that CAC deems high-end for their grades receive green stickers, [3] which usually add premiums ranging from single digit percentages to 92% or more.
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. Several grading systems have been ...
Printed on the front of the blue paper insert is the coin's type, denomination, grade, attribution, pedigree (if any), serial number, Universal Product Code (UPC), and other pertinent information. [11] [12] First-generation PCGS coin holders are smaller and lack the raised stackable edges of later issues. Their insert was printed on plain white ...
Standard Catalog of World Gold Coins: With Platinum and Palladium Issues: 1601–present, 6th Edition, publication date 2009, Krause Publications, ISBN 978-1-4402-0424-1 Digital copy available separately. Unusual World Coins, 6th Edition, publication date 2011, Krause Publications, ISBN 978-1-4402-1702-9 Digital copy available separately.