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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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Bicentennial Quarter

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  • #1

    Bicentennial Quarter

    Hey gentlemen procured a 1976 bicentennial Quarter the other day and it looks like someone tried to burn it or something. I don't really know just a guess. But I was wondering if y'all could give me a suggestion on cleaning it up. Now I know your not suppose to clean coins cause it causes them to lose value. But It bothers me just a little bit ..It being my birthday year and everything.... As always thank you for your help.
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  • #2
    Hummm not sure what to use on burnt coins. There is always the possibility it was slabbed, in a mylar or plastic flip. Some of that may have adhered to the coin surface. An ultrasonic cleaner, with this sole coin in it may work. Now for what type solution to clean silver ? Not sure.

    Others have tried hot boiling water and baking soda. I highly recommend doing that combo outside. Boil you water. Find a sturdy non melting container and line the bottom with a piece of aluminum foil. Place coin in container. Add hot water, and depending on size of container 1 to 4 heaping tablespoons of aging soda. When most of the fizzing is done, you can take it out. Rinse the coin off with cold water. Use a piece of bounty towel with a tad of water, and gently rub the coin to see if any addition junk comes off. Rinse once again.

    Sometimes the side that is on the foil will remain a little dirtier than the other side. You may have to improvise some sort of way for the coin to stand on edge, so it is not effected as much.

    If you plan on trying this be careful and do at your own risk.
    Last edited by MintErrors; 09-19-2022, 11:30 PM.
    Gary Kozera
    Website: https://MintErrors.org
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    • #3
      Here are the pics of them if it helps. And if it doesn't affect the coin as far as value etc. I will just leave it alone. Thanks Again
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