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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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Cleaning?

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  • #1

    Cleaning?

    I know it’s recommended not to clean your coins as it lessens the value, however I have some coins that have been in the ground a LONG time along the shore of a salt water river while a foundation was being dug in the 1970’s. I can’t tell if there’s errors because of the grime and salt. Would it be ok in y’all’s opinion to use a hypersonic jewelry cleaner with only distilled water to loosen some of the grime? I look forward to your advice! Thank you in advance!
    Tags: learning, newbie, quarter, question
  • #2
    IMHO, I would think that environmental damage already exists on these buried coins. I don't believe anything more from an ultrasonic cleaner would make a big difference.
    Bob Piazza
    Lincoln Cent Attributer
    • 1 like

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    • #3
      Will an ultrasonic cleaner cause damage to other coins? I have a couple of nice error quarters with sticky crap on them. Sorry for all the questions
      Last edited by Driffle66; 09-02-2022, 03:12 PM. Reason: Incorrect grammar

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      • #4
        I have an ultrasonic cleaner, and with just water, it should not be a big deal.

        Coins that have been in the ground, in the eyes of a third party grading service would receive a details grade, and thus it would not receive the highest value anyway.

        I personally have experimented with a few weird ideas to clean some coins, but these were not sellable, but one of them was a 1956-D Lincoln cent, CONECA RPM 001. It had a huge patch of the greenish slimey verdigris on it, and I wanted to see if I could make it clean enough to photograph. The post about this coin is here:

        https://minterrors.org/cleaning-a-co...d-you-do-this/

        People tend to shy away from environmentally damaged coins, so it is always up to the current owner of the coin to determine if they should or not.
        Last edited by MintErrors; 09-03-2022, 02:03 AM. Reason: Typos...
        Gary Kozera
        Website: https://MintErrors.org
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        • #5
          Thank you so much for the wealth of information! It’s given me a lot to think about.

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