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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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2010 Proof Lincoln Error

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  • 19Lyds
    • Aug 2007
    • 240

    #16
    "Division Lines" sounds good.


    Now if I can only remember that.
    Lee Lydston

    Comment

    • kshuma
      • Feb 2011
      • 24

      #17
      Hi Guys,

      Now this is what most of us YN's (new to error collecting) really want to read and see. Very in-depth discussion and imaging, especially when it comes down to what is considered DD or MD and realistically (for some) $1 vs $100. I feel the more informed we all are the better off we'll be in the future as our collecting skills grow.

      I sure I can speak for all YN's and casual collectors

      GREAT STUFF!

      Thanks a million
      Ken

      Comment

      • jcuve
        Lead attributer
        • Apr 2008
        • 1497

        #18
        I can add at least one set of images of a 1974 proof Lincoln which sure would appear like class I doubling at first glance:



        A closer examination demonstrates a lack of notching, no rounded doubling (rather a flat doubling near the field) and a slight surface change in the doubled areas. Machine Doubling is doubly confirmed when there is also MD on the mintmark below...

        Jason Cuvelier

        CONECA
        Lead attributer

        Comment

        • kshuma
          • Feb 2011
          • 24

          #19
          Hi Jason

          Great information thank you. I have just posted some pics of coins that I thought to be DD. I am very glad I now know the difference, well on a few any.

          Ken

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