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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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  • #31
    does that include the mint mark also?

    cause i have so many 68, 69,70 s that are so different from high huge to low and micro size.

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    • #32
      No, we are very sure that the mint marks were punched into the working dies (it would have been to time consuming to engrave mint marks into thousands of working dies per year) until 1989. As to punching in the mint mark after that (in the year 1990 to the present), we assumed that it was punched into the master die.

      BJ Neff
      Member of: ANA, CCC, CONECA, Fly-in-club, FUN, NLG & T.E.V.E.C.

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      • #33
        Originally posted by cnladue View Post
        cause i have so many 68, 69,70 s that are so different from high huge to low and micro size.
        I don't know if there was more than one mintmark style used for the San Francisco mintmark in these years. If there was, that might account for some of the variation you're seeing. But even if there was only one style, the appearance of mintmarks will vary. Die deterioration can make a mintmark appear larger and less well-defined. Die abrasion ("polishing") can make a mintmark appear thinner and smaller. The depth of the punch can also theoretically vary. A shallow punch will produce a smaller, thinner mintmark. If the punch entered the die face at a slight angle, that will also affect the appearance.
        Mike Diamond. Error coin writer and researcher.

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        • #34
          i vote for in graving

          i have dozens of mm from late 60s that are so uniquely placed and slanted or crooked , it seems to me a punching device would limit much of that..

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          • #35
            There is no "punching device". It's just a hand-held punch that's given a tap by a hammer wielded by the mint technician.
            Mike Diamond. Error coin writer and researcher.

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