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  2. US error coins - Wikipedia

    en.wikipedia.org/wiki/US_error_coins

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  3. Mint-made errors - Wikipedia

    en.wikipedia.org/wiki/Mint-made_errors

    Overdate coins such as the 1942/1 U.S. Mercury dime and 1918/7 U.S. buffalo nickel are also doubled dies. They are both listed by CONECA as class III doubled dies. [ 4 ] Class III means the die was hubbed with different "designs" (or hubs that had different dates).

  4. Knuth reward check - Wikipedia

    en.wikipedia.org/wiki/Knuth_reward_check

    The reward for coding errors found in Knuth's TeX and Metafont programs (as distinguished from errors in Knuth's books) followed an audacious scheme inspired by the wheat and chessboard problem, [10] starting at $2.56, and doubling every year until it reached $327.68. [3]

  5. 10 Most Valuable American Dimes in Circulation - AOL

    www.aol.com/10-most-valuable-american-dimes...

    Dimes make dollars, they say. But some dimes are worth more than a few dollars. As Gainesville Coins detailed, there are U.S. dimes that have sold for more than seven figures in the past. Learn:...

  6. Counterfeit money - Wikipedia

    en.wikipedia.org/wiki/Counterfeit_money

    American 18th–19th century iron counterfeit coin mold for making fake Spanish milled dollars and U.S. half dollars. Counterfeiting has occurred so frequently in history that it has been called "the world's second-oldest profession". [5] [6] Coinage of money began in the region of Lydia in Asia Minor around 600 BC.

  7. United States Mint coin production - Wikipedia

    en.wikipedia.org/wiki/United_States_Mint_coin...

    This table represents the mintage figures of circulating coins produced by the United States Mint since 1887. This list does not include formerly-circulating gold coins, commemorative coins, or bullion coins.

  8. File:US-$10000-FRN-1918-Fr-1135d.jpg - Wikipedia

    en.wikipedia.org/wiki/File:US-$10000-FRN-1918-Fr...

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  9. File:US-$2-FRBN-1918-Fr.749.jpg - Wikipedia

    en.wikipedia.org/wiki/File:US-$2-FRBN-1918-Fr...

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