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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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Need Help Mint Set Error? (warning big photos)

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  • Need Help Mint Set Error? (warning big photos)

    This is a still sealed in the Mint Set. Any help will be appreciated.

    I'm not an error person but to me this coin is very interesting because I can't figure out how it happened. The thing that makes me scratch my head the most is it looks like there is 2 different metal flow directions, I don't know if this is possible or not.





    Last edited by coinzip; 01-31-2010, 01:27 PM.
    Helping collectors find Coin Shows since 2008

  • #2
    I'm not sure what's going on here. The streakiness of the pale area argues against a simple stain. The affected area doesn't appear to be sunken, so that would seem to eliminate any sort of strike-through error. It's unlikely to be a die preparation defect, since these don't typically affect both field and raised design elements.

    I do have a question, though. What's with all the tiny bumps I seem to see? These seem most abundant in the normal-looking area but do occur in the pale gray area.
    Mike Diamond. Error coin writer and researcher.

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    • #3
      "What's with all the tiny bumps I seem to see?"

      you can't see them under 10x magnification

      they stand out like a sore thumb under 100X magnification.

      Feel free to call me 301-876-4849
      Helping collectors find Coin Shows since 2008

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      • #4
        If this coin was not sealed in a mint set I would have dismissed it as post mint damage, it realy looks like something ate away part of the metal.
        Last edited by coinzip; 01-31-2010, 02:17 PM.
        Helping collectors find Coin Shows since 2008

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        • #5
          So the area looks sunken, then? If so, then perhaps a corrosive liquid spilled on the coin and etched it, exposing the "grain" of the clad layer.
          Mike Diamond. Error coin writer and researcher.

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          • #6
            Yes the area looks sunken.

            if so it happend before they packaged it at the Mint.....?
            Helping collectors find Coin Shows since 2008

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            • #7
              That would undoubtedly be the case. Some years ago Fred Weinberg sent me a pile of Susan B. Anthony dollars with an appearance similar to your coin. At the time I concluded the coins were chemically etched inside the mint.
              Mike Diamond. Error coin writer and researcher.

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              • #8
                Thank you for taking the time to help.
                Helping collectors find Coin Shows since 2008

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