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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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  • #1

    1980

    I understand that these 2 coins are composed of the same (95% copper and 5% zinc, weight 3.11 gm) my concern is that the one that has nothing should weigh less than this one (1980 2.53 gm) however the other weighs (2.89 gm) I would appreciate your opinion gentlemen
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  • #2
    Environmental damage.
    They've been in the ground.
    They are basically worthless, the pitting gives that away.

    Once they in they are in the ground all bets off that they are going to weigh normal.
    Gary Kozera
    Website: https://MintErrors.org
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    • #3
      thank you for your opinion sir

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