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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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Nothing Straight Forward

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  • #1

    Nothing Straight Forward

    Nothing is straight forward these days. Here is a 1983-P Lincoln penny that should obviously be around 2.50 grams copper coated zinc. However, this 1983 weighs in at 2.82 grams. Not the 3.1 grams that would indicated an all copper penny but half way between the 2.5 and 3.1 grams.

    What do you think about this one?
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  • #2
    Presuming it's a copper-plated zinc planchet (and its appearance is consistent with that identity), the excess weight could be due to the zinc core being punched out of strip that was rolled too thick or it could reflect copper plating that was deposited in too thick a layer.
    Mike Diamond. Error coin writer and researcher.

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