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  2. Mint-made errors - Wikipedia

    en.wikipedia.org/wiki/Mint-made_errors

    Mint-made errors occur when coins are made incorrectly ... A wire rim occurs when excessive pressure squeezes out metal between the collar and the edge of the die ...

  3. Category:Mint-made errors - Wikipedia

    en.wikipedia.org/wiki/Category:Mint-made_errors

    Pages in category "Mint-made errors" The following 12 pages are in this category, out of 12 total. This list may not reflect recent changes. ...

  4. 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.

  5. Die-deterioration doubling - Wikipedia

    en.wikipedia.org/wiki/Die-deterioration_doubling

    In addition, the mint has a practice of polishing the dies and using them longer. When a die begins to show evidence of wear, a mint technician will polish the die and reuse it. However, the die is still rapidly deteriorating, and polishing it cannot avoid the problem of wear.

  6. United States quarter mintage figures - Wikipedia

    en.wikipedia.org/wiki/United_States_quarter...

    6 over 5 overdate errors are known. [3] 1807 (P) 220,643 Capped Bust quarter ... Mint records do not state any were made. A single example is known to exist. [55 ...

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  8. Airlines making a mint off your booking errors - AOL

    www.aol.com/news/2009-07-23-airlines-making-a...

    The British, as a culture, have come a long way since swiping the Elgin Marbles from Greece. They still won't give them back, of course, but the British are nonetheless inscrutably accountable ...

  9. Brockage - Wikipedia

    en.wikipedia.org/wiki/Brockage

    Brockages are relatively rare among modern coins of industrialised countries where mints exercise a strict production control and somewhat less rare among the modern coins of some developing countries which operate their own mint (e.g. Nepal); in good condition, coins with clear brockage are a collector's item and can sell for substantial ...