1990D Lincoln acid bath???

Discussion in 'Error Coins' started by Bargainbidder, Sep 9, 2019.

  1. Bargainbidder

    Bargainbidder Well-Known Member

    Was this caused by an acid bath? Copper plating can be seen on top part of letters and rim. And the bubbling areas on reverse.
     

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    Bargainbidder, Sep 9, 2019
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  3. Islander80-83

    Islander80-83 Well-Known Member

    It's called normal circulation zinc rot.
     
    Islander80-83, Sep 9, 2019
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    Heavymetal and spirityoda like this.
  4. Conder101

    Conder101 Numismatist

    Yes it looks like the copper plating has been chemically stripped off.

    The three pits in the obv rim are the result of zinc rot.
     
    Conder101, Sep 10, 2019
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