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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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Large Lump in the lincoln memorial

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  • Large Lump in the lincoln memorial

    Can anyone tell me how this happened?
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  • #2
    It looks like a die dent or some kind of die deformation. It doesn't look like a clash mark. It's too blunt and too far to the left to represent the back of Lincoln's coat.
    Mike Diamond. Error coin writer and researcher.

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