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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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Planchette Variety

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  • Planchette Variety

    I have a 1940 one cent coin which was stamped on a plalnchett identical in diameter to that of a mercury dime.
    In weight (grams) the thin cent weighs 1.7 grams while a usual penny weighs 3.1 gram, Viewing from the rims, the thin penny appears to be slightly 1/2 the thickness of other copper cents. condition is g-vg due to the light strike.
    It appears to be well struck but light)and good color, but it is rimless

    How can I know if this is a mint error or counterfit? If genuine, is there a market for this type of error?

    I will greatly appreciate your comments.

  • #2
    If the coin is well-centered, with a uniformly blurred design on both faces, and thinned letters and numbers, then you coin was immersed in acid or another corrosive liquid. These "acid jobs" are abundant.
    Mike Diamond. Error coin writer and researcher.

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    • #3
      Planchette variety

      The cent is neither blurred nor the letters thin; however, the word liberty is nearly unreadable. Too small,


      Thanks for the explanation, on we go to the next item, whenever.

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