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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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1957-D Foreign Planchet?

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  • 1957-D Foreign Planchet?

    I was wondering if this could be an foreign planchet or what kind of mint error this could be.
    Obverse picture
    http://www.permitfinder.com/coins/PICT0176.JPG
    Reverse Picture
    http://www.permitfinder.com/coins/PICT0178.JPG
    Side by side comparison, it is smaller than an normal 57-D
    Last edited by chrsb; 09-20-2007, 07:46 PM. Reason: Fix Advertising, made file smaller

  • #2
    It's an "encased cent". It was squeezed to a smaller diameter when a metal ring it was inserted into was struck. In other words, it's not an error.
    Mike Diamond. Error coin writer and researcher.

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    • #3
      I had thought of that, I have 3 from a BU roll of 50 of these. Some of them have full rims, this one has it 3/4 of the way around. I weighted it and it weights 3.05 grams. Here is a side view, it only does this 1/4 of the way around the rest is flat like a regular cent.

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      • #4
        I see that the edge of the coin is concave in vertical cross-section. This is characteristic of encased cents. No authentic error would end up with an edge like this.
        Mike Diamond. Error coin writer and researcher.

        Comment


        • #5
          Thank you for your observations, just in case here are photos of 2 more from the same roll, I am particularly interested in the second photos rim.
          http://www.permitfinder.com/coins/1957DO2.jpg
          http://www.permitfinder.com/coins/1957DR2.jpg
          http://www.permitfinder.com/coins/1957DR3.jpg
          http://www.permitfinder.com/coins/1957DO3.jpg

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          • #6
            Deformed, abnormally broad, and sloping "rims" are typical of encased cents. Often the metal is pushed up into a circular ridge along the internal margin of the "rim".
            Mike Diamond. Error coin writer and researcher.

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