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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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1979 Penn

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  • #1

    1979 Penn

    Doubled or machine Double
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  • #2
    ​ ​Machine doubling. This what I do if I think I have found something while searching coins. First thing I do is look at Variety Vista and see if there any DDO or DDR's for your coin. If there has not been one discovered the chance of you finding a DDO or DDR is pretty slim. I learned the hard way and now I really just focus on known Mint errors. Here is the link to a few websites that really helped me out. Happy hunting

    http://www.varietyvista.com/
    http://coppercoins.com/
    https://doubleddie.com/228401.html
    https://www.error-ref.com/
    Last edited by PNWMAKES; 04-10-2022, 06:39 PM.
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    • #3
      Thank you for your consideration and time and response appreciate

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      • #4
        Originally posted by PNWMAKES View Post
        ​ ​Machine doubling. This what I do if I think I have found something while searching coins. First thing I do is look at Variety Vista and see if there any DDO or DDR's for your coin. If there has not been one discovered the chance of you finding a DDO or DDR is pretty slim. I learned the hard way and now I really just focus on known Mint errors. Here is the link to a few websites that really helped me out. Happy hunting

        http://www.varietyvista.com/
        http://coppercoins.com/
        https://doubleddie.com/228401.html
        https://www.error-ref.com/
        Congrats ! I like to see the thought process of fellow self attributers. This makes sense. Others might chime in and slightly disagree, but the odds are truly in your favor - time too. SURE there can be a combination of a variety and damage as one other forum member has stated in another post, but the elimination of coins which have no documented examples surely pushes it into the "probably not" category.


        Youre a Winner !.gif
        Gary Kozera
        Website: https://MintErrors.org

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        • #5
          Its highly unlikely but very possible to find new varieties. Just yesterday i went through a roll of my favorite year, 54-S and found 8 doubled eyelids not listed anywhere along with a few listed RPMs. A minor thing but still, not listed. The sites listed in PNW comment are my go to sites as well. Its best to check several sites because some have listings that others dont. Once you learn about the process a coin goes through at the mint, you can check off most of the coins you have questions about.

          #1. Learn about the minting process
          #2. Learn about Machine Doubling, Die Deterioration and Doubled Dies

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