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2. United States Mint coin sizes - Wikipedia

   en.wikipedia.org/wiki/United_States_Mint_coin_sizes

   In particular, many silver coins changed in the 1870s. [4] The figures cited in the tables are representative of the series, and are generally the latest, or most common, figures for a given coin type. The largest coin ever minted by the US Mint was the 2019 Apollo 50th anniversary 5ounce silver dollar, weighing 155.517 grams, and 76.2 mm in ...

3. Sobriety coin - Wikipedia

   en.wikipedia.org/wiki/Sobriety_coin

   A sobriety coin is a token given to Alcoholics Anonymous or other twelve-step program members representing the amount of time the member has remained sober. It is traditionally a medallion the size of a poker chip, 34 mm (1.34 in) (standard) or 39 mm (1.5 in) in diameter. In other twelve-step programs it is to mark time abstaining from whatever ...

4. Penny (United States coin) - Wikipedia

   en.wikipedia.org/wiki/Penny_(United_States_coin)

   The cent, the United States of America one-cent coin (symbol: ¢ ), often called the " penny ", is a unit of currency equaling one one-hundredth of a United States of America dollar. It has been the lowest face-value physical unit of U.S. currency since the abolition of the half-cent in 1857 (the abstract mill, which has never been minted ...

5. Professional Coin Grading Service - Wikipedia

   en.wikipedia.org/wiki/Professional_Coin_Grading...

   Professional Coin Grading Service ( PCGS) is an American third-party coin grading, authentication, attribution, and encapsulation service founded in 1985. The intent of its seven founding dealers, including the firm's former president David Hall, was to standardize grading. [ 4][ 5] The firm has divisions in Europe and Asia, and is owned by ...

6. Certified Acceptance Corporation - Wikipedia

   en.wikipedia.org/wiki/Certified_Acceptance...

   Website. CACCoin.com. Certified Acceptance Corporation ( CAC) is a Far Hills, New Jersey third-party coin certification company started in 2007 by coin dealer John Albanese. The firm evaluates certain numismatically valuable U.S. coins already certified by Numismatic Guaranty Corporation (NGC) or Professional Coin Grading Service (PCGS). [1] [2]

7. Coin slab - Wikipedia

   en.wikipedia.org/wiki/Coin_slab

   Coin slab. 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.