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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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2021 Quarter Crossing The Delaware Mint Mark Doubling?

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  • #1

    2021 Quarter Crossing The Delaware Mint Mark Doubling?

    I'm curious of what type of doubling I may have in the three quarter photos. I was recently lucky to have found a DD mint mark in the last photo of a 1960 D penny. Thanks....
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  • #2
    The quarter mintmark look like die deterioration mixed with a little machine doubling. The 1960-D cent however is a very nice RPM.

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    • #3
      Thanks for the input CoinHunter, I've been collecting errors for 10 years now off and on, and the mint mark for me is still a hard one.

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