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CONECA (pronounced: CŌ´NECA) is a national numismatic organization devoted to the education of error and variety coin collectors. CONECA focuses on many error and variety specialties, including doubled dies, Repunched mintmarks, multiple errors, clips, double strikes, off-metals and off-centers—just to name a few. In addition to its website, CONECA publishes an educational journal, The Errorscope, which is printed and mailed to members bimonthly. CONECA offers a lending library, examination, listing and attribution services; it holds annual meetings at major conventions (referred to as Errorama) around the country.

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Die chips on modern dimes

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  • N-8266
    • Jan 2026
    • 22

    Die chips on modern dimes

    I’ve collected multiple examples of die chips and small die breaks, but I’m having trouble finding clear guidance on where the threshold is between minor chips, major die breaks, and pieces that carry real premium value. I understand that condition (especially uncirculated) and collector demand play a big role, but is there any accepted technical or market benchmark—size, location, die state progression—that typically separates minor errors from more valuable ones? I've attached a few examples of what I have.
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  • MintErrors
    Minterrors.org
    • Jun 2015
    • 4005

    #2
    In my opinion, its all about drama. If it can be seen with the naked eye, it might stir interest with the collectors. I have seen my fair share of errors and honestly, the die chips are tossed into our dollar bin.

    In 2002 the US Mint increased the quality assurance and control. Not many major mint errors escape the mint any more. People have reverted to looking for anything with a possible error. The new fangled cheaper microscopes have sparked renewed interest in coins but the magnification used on these scopes is way too high. Very minor conditions can look great at high power, but in reality, they are pretty common.
    I typically tell clients to consider looking for overdates and doubled dies from other countries to satisfy that itch. Many are available from 1600 to the mid 1990s.

    The CONECA staff frown on talking value here. Die cracks that are dramatic are often found on the higher end auction houses like heritage auctions, great collections or stacks-bowers.

    I would look at the average pricing of them with similar drama. Eliminate the ones that are obviously much higher than norm. Some people just go on a rampage and dont want to lose and they will go to no ends to win. In that instance its more about egos than the collectible value.


    My signature block :

    Three helpful posts:
    How to take better photos with a Cellphone:
    https://board.conecaonline.org/forum...th-a-cellphone

    RPM or DDO question? Help us help YOU:
    https://board.conecaonline.org/forum...lp-us-help-you

    What Forum to post your coin questions:
    https://board.conecaonline.org/forum...t-forum-to-use

    Gary Kozera
    Website: https://MintErrors.org

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    • N-8266
      • Jan 2026
      • 22

      #3
      Thank you for sharing your insight and perspective. Ill keep it focused on the major errors. I would like a little more info about the drooling Roosevelt.

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