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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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Flat Field Strike Doubling "FFSD" ??

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  • #1

    Flat Field Strike Doubling "FFSD" ??

    Is there is difference between "FFSD" and The "Basic" Strike Doubling ?? The Basic one is after strike right ??? And The "FFSD" occur's at the initial Kiss of the strike right ???? I'm open to any feedback on this.. thanks
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  • #2
    Flat field doubling is an effect generated by a double strike. Strike doubling is generated by a single strike. I really don't like the term or concept of flat field doubling. It should simply be subsumed under double strike.

    Doubling that occurs at initial contact does occur, but is referred to as a stutter strike.
    Mike Diamond. Error coin writer and researcher.

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