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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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Bicentennial quarter

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  • #1

    Bicentennial quarter

    I have a bicentennial quarter with no mint mark and it should weigh 5.67 grams but it weighs 5.75 grams .Did a calibration with a 100 gram weight and it should be right. Typed question in on internet and it came back that it is counterfeit or reworked.Can't remember if that reworked but something like that.Help please. IMG_20230626_172503 (1).jpg IMG_20230626_172503 (1).jpg
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  • #2
    There is tolerances, and that seems pretty minor, if you are thinking this is a CLAD quarter. It's only eight one hundredths of a gram off.

    The bicentennial version, i believe there was a silver version of the coin as well.

    Here is some info on the different quarter types.
    https://washingtonquarters.org/washi...pecifications/
    Gary Kozera
    Website: https://MintErrors.org

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