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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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Looking for Opinions on this Eisenhower.....

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  • Looking for Opinions on this Eisenhower.....

    I don't remember where I picked this coin up but I'm sure it was due to the toning. To make a long story short, after examining it closely, I saw what appears to have been mechanical doubling. However after further examination under my scope, I'm fairly confident that it is not mechanical doubling and I would like some opinions from the CONECA folks as to what would cause this. I pieced together some photos.

    ..



    Individual close ups starting at the top and working down:












    And finally, the entire obverse:


    The letters and numbers appear to be totally unaffected which has me really curious.
    Lee Lydston

  • #2
    I am fairly sure that this is what is called ejection arm doubling. This occurs when the coin actually sticks to the die and is forceable removed by the ejection arm. This action causes the coin to strike the retreating die again as it is ejected causing the lines that appear as division lines. If it were a true doubled die, I suspect that some doubling would be seen around the nostril area.

    BJ Neff
    Member of: ANA, CCC, CONECA, Fly-in-club, FUN, NLG & T.E.V.E.C.

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