What causes this ?

Discussion in 'Error Coins' started by lillyboots, Jul 19, 2011.

  1. lillyboots

    lillyboots Member

    I was wondering what causes this to occur? Some look like small bubbles that burst P1030073 (Medium).JPG P1030074 (Medium).JPG but some seem to be extra material on the coin?
     
    lillyboots, Jul 19, 2011
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  3. ikandiggit

    ikandiggit Currency Error Collector

    Zinc rot.
     
    ikandiggit, Jul 19, 2011
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  4. Harley.d

    Harley.d Love coins

    +1
     
    Harley.d, Jul 20, 2011
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