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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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1963 1-Cent. Does it have a hardness test mark?

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  • #1

    1963 1-Cent. Does it have a hardness test mark?

    Heres a mystery i have. Any ideas?
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  • #2
    Perhaps with that spheical cone tipped diamond? The Rockwell Hardness test with a 1 sixteenth inch sphere is normal, but also they have different sizes also t he spherical Diamond.
    Or, its a pmd countermark stamp.

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    • #3
      Perhaps with that spheical cone tipped diamond? The Rockwell Hardness test with a 1 sixteenth inch sphere is normal, but also they have different sizes also t he spherical Diamond.

      Or, its a pmd countermark stamp.

      Comment

      • #4
        weren't the tests done on the dies not the coins? then it would be raised on the coin.

        fwiw, i'm in the pmd camp cuz you can see the spot on the rev where it was punched into the obv.
        coinfacts.com - conecaonline.info - board.conecaonline.org/forum/numismatic-site-links - briansvarietycoins.com - coppercoins.com - cuds-on-coins.com - doubleddie.com - error-ref.com - franklinlover.yolasite.com - ikegroup.info -lincolncentresource.com - maddieclashes.com - money.org - ngccoin.com/price-guide/world - ngccoin.com/census - ngccoin.com/resources/counterfeit-detection - nnp.wustl.edu - pcgs.com/pop - pcgs.com/coinfacts - pcgs.com/photograde - varietyvista.com - vamworld.com

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