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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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  • N6465

    New to the forum wondering about the markings on the the wings of this 2021d quarter thanks for any help.

  • #2
    This is not hub doubling. It is either MD or part of the design. Where and on what quarter is this located?
    Bob Piazza
    Lincoln Cent Attributer


    • #3
      It's on a 2021d Tuskegee quarter reverse on the back edge of the bottom plane wing
      Last edited by N-6564; 02-23-2021, 11:55 AM.


      • #4
        I agree, it is machine doubling.
        Jason Cuvelier
        CONECA - ErrorVariety.com - Traildies.com - MADClashes.com - Error-Ref.com
        (all images I use are ©Jason Cuvelier 2008-13)