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  2. US error coins - Wikipedia

    en.wikipedia.org/wiki/US_error_coins

    The over mint mark is created when a one date and mint mark is punched over another date, part of a date, or mint mark. These coins are generally restricted to the early minting process of coins dating before the turn of the century. The DDO and DDR errors are related to any part of the coin that shows a distinct doubling.

  3. Errors are common feature in valuable coins and can push values up to six figures or higher. Check Out: 8 Rare Coins Worth Millions That Are Highly Coveted by Coin Collectors Trending Now: Check ...

  4. Mint-made errors - Wikipedia

    en.wikipedia.org/wiki/Mint-made_errors

    Tilting errors occur when die surfaces are not parallel producing coins that are thinner along one edge, and sometimes causing missing design elements along the opposite edge because of insufficient pressure being exerted on that edge. Rotation errors occur when the images on the obverse and reverse dies are turned from the normal positions ...

  5. An auction run by GreatCollections Coin Auctions, the official auctioneer of the American Numismatic Association, a nonprofit organization that provides educational materials and programming about ...

  6. 10 Most Valuable American Dimes in Circulation - AOL

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

    Most U.S. coins are minted for circulation or as collector coins at three production facilities: Denver, Philadelphia and San Francisco (the West Point mint ceased making coins in 2021).

  7. Kennedy half dollar - Wikipedia

    en.wikipedia.org/wiki/Kennedy_half_dollar

    "W" mint mark only on 2014 commemorative issue. Mint mark located beneath where the eagle's claws grasp the olive branch on reverse for 1964 coins and for 1964-2014-W gold issue; above the date on the obverse for all other issues. Mint mark omitted on all coins from 1965 to 1967 and on Philadelphia Mint issues before 1980. Obverse; Design

  8. Coin edge - Wikipedia

    en.wikipedia.org/wiki/Coin_edge

    Dieu★ protège★la★France★★★ "God protect France" on the edge of 1873 five-franc coins Examples of edge inscriptions or edge lettering include e pluribus unum on the edge of U.S. Presidential dollar coins, various national €2 edge inscriptions, and various phrases on the UK one pound coin, most commonly decus et tutamen.

  9. Washington quarter mintage figures - Wikipedia

    en.wikipedia.org/wiki/Washington_quarter_mintage...

    Eagle reverse, 1932–1964 (Silver) Year Mint Mintage [1] [2] Comments 1932 (P) 5,404,000 D 436,800 S 408,000 1934 (P) 31,912,052 Doubled die errors are known.