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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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We thank everybody who has helped make CONECA the great success that it is today!

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If you can tell me what this is, you win the game.

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  • signofthedimes
    • Jan 2023
    • 2161
    #1

    If you can tell me what this is, you win the game.

    Two foreheads, two noses, two mouths.

    Screenshot_20260111-021519_Photos~2.jpg Screenshot_20260111-021856_Photos~2.jpg
    Last edited by signofthedimes; 01-11-2026, 04:52 PM.
    Tags: None
  • signofthedimes
    • Jan 2023
    • 2161
    #2
    A quick look on Google for what happens when a dime thickness planchet is heated at a quarter's heat. And so then I also gathered that a bubble that had started to meet the strike, at a first and higher point caused the secondary impression but as the die came down further it created normal impression therein ending up with two impressions, inside what's pooled to be sides of a large gas bubble. A gas bubble becoming an occluded gas bubble retaining a secondary image.

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