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A few years ago I found a dime that appears to be post mint damage, but it's not. I've studied this and other coins with a Scanning Electron Microscope in order to determine that it indeed had an un-struck raw planchet surface on its reverse where there had been a massive central die failure. The simplest evidence on the coin is the struck-through objects, that are chips of die material that were resting on the reverse die. This coin is almost too extreme to believe, but all of the forensic evidence is there. I've written a short article about it in ErrorScope Nov-Dec. I hope that you'll read it.4716918-001r.jpg
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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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