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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.

CONECA was formed through a merger of CONE and NECA in early 1983. To learn more about the fascinating HISTORY OF THE ERROR HOBBY and THE HISTORY OF CONECA, we encourage you to visit us our main site Here

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  • txbunny67
    • Aug 2023
    • 15
    #1

    Glad to be apart of this Site

    IMG_0111.jpeg I found this 2016 while roll hunting. Could anyone tell me what type of doubling this is? I get very confused when looking at the doubling. And since I’m what I consider fairly new to this (I had to stop for a bit) a refresher course is always nice.
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  • occnumis2021
    NumisScholar
    • May 2021
    • 1422
    #2
    machine doubling.

    image_40215.jpg
    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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    • MintErrors
      Minterrors.org
      • Jun 2015
      • 3554
      #3
      In my opinion, it's classic machine doubling. One of the impressions is lower and shelf like or step like.
      The other is that they dont look the same, it shows up thinner or damaged looking.

      Machine Doubling
      https://www.error-ref.com/machine-doubling/


      John Wexler did an article on worthless doubling. Its extensive and shows the difference between worthless doubling types abd true doubled dies. See worthless doubling at https://doubleddie.com

      Articles in my signature might help.
      Last edited by MintErrors; 08-14-2023, 09:33 PM.
      Gary Kozera
      Website: https://MintErrors.org

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