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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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  • DDR

    It's been a while but is this DD or not please explain if you don't think so. It's a Jefferson Nickel P....
    Attached Files

  • #2
    looks like standard md. no explain necessary.

    image_39628.jpg
    coinfacts.com - conecaonline.info - board.conecaonline.org/forum/numismatic-site-links - briansvarietycoins.com - coppercoins.com - cuds-on-coins.com - doubleddie.com - error-ref.com - franklinlover.yolasite.com - ikegroup.info -lincolncentresource.com - maddieclashes.com - money.org - ngccoin.com/price-guide/world - ngccoin.com/census - ngccoin.com/resources/counterfeit-detection - nnp.wustl.edu - pcgs.com/pop - pcgs.com/coinfacts - pcgs.com/photograde - varietyvista.com - vamworld.com

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    • #3
      So this is what I don't understand....I look at the books and sites with the pics and see M.D. and DD. And there are a lot that look the same. Like this one that i took looks like several on the variety Vista coin site. It's a bit confusing to guys like me that haven't been doing this long. Thank you for time.

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      • #4
        In my opinion:

        It's lower and flat or shelf/ step like. An almost sure sign of worthless doubling. One has to realizevwhat a doubled die is and how it is made. Doubled dies have multiple impressions on a die that are a little off. The KEY here is.... they use the same pressure to sink those impressions into the die. That means, each impression is at the same depth. Then when coins are made by that working die the height of those impressions should be at nearly the same height. Both should be raised, some of them should overlap each other and might show those cookie cutter lines at the TOP (height wise) of the coins, at the same hieght.

        Here is a classic doubled die. Not every one is going to look this obvious, but it ticks all of the boxes i mentioned above.

        https://minterrors.org/wp-content/up...acecard-03.jpg

        As for researching references. The attributors show photos on the area of the coin which show the doubled die. Those areas are struck into steel and the area of doubling will not move. Any candidate of a coin should match up almost exactly. There is no close enough in this situation.

        One thing I mention from time to time is, if it does not exist out there after xx years, the odds are the coin in hand is not a doubled die. Dies typically strike hundreds of thousands of coins,. Odds are some one would have found it long ago, if 5 or more years have passed.

        On John Wexlers site, https://doubleddie.com he has a section on worthless doubling. He has a section on Jefferson Nickels and shows the difference between worthless doubling and actual doubled dies. Note the height difference on each.

        Knowing the year of this coin would have helped - but only minutely. The end result is still the same - its worthless doubling. IF I had to guess the ratio of worthless doubling to a true doubled die ratio, I'd have to say in this day and age, it is northward of 1,000 worthless doubling finds to maybe one true doubled die. The U S Mints haven't produced any "true" doubled die working dies since 1996.
        Last edited by MintErrors; 07-29-2023, 06:22 AM.
        Gary Kozera
        Website: https://MintErrors.org

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        • #5
          Originally posted by CrzyWytCrakr View Post
          It's been a while but is this DD or not please explain if you don't think so. It's a Jefferson Nickel P....
          After such an outstanding outline of this subject from M.E all I can offer is this for you to also have as a reference.
          Please next post include the date and mint mark so nobody has to guess or ask for more information, Thank you
          Doubling.jpg

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          • #6
            Or this one.
            https://minterrors.org/wp-content/up...2022/02/MD.jpg
            Gary Kozera
            Website: https://MintErrors.org

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