How does shelf doubling on modern coins happen?

Discussion in 'Coin Chat' started by coinzip, Sep 23, 2014.

  1. coinzip

    coinzip Well-Known Member

    Can anyone explain what is going on during the minting process to make this (rather cool looking) effect?


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    coinzip, Sep 23, 2014
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  3. Dougmeister

    Dougmeister Well-Known Member

    Dougmeister, Sep 23, 2014
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    coinzip likes this.
  4. geekpryde

    geekpryde Husband and Father Moderator

    geekpryde, Sep 23, 2014
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  5. Treashunt

    Treashunt The Other Frank

    The same as on old coins:

    Die chatter
     
    Treashunt, Sep 23, 2014
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  6. GDJMSP

    GDJMSP Numismatist Moderator

    The simple answer, (another way of saying what Frank did) the coin bounces and hits the dies during the striking process.
     
    GDJMSP, Sep 23, 2014
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  7. Treashunt

    Treashunt The Other Frank


    Actually, Doug, I believe it is the other way around:

    The die bounces.
     
    Treashunt, Sep 23, 2014
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  8. Conder101

    Conder101 Numismatist

    Or shifts during the strike because something has worked loose in the press.
     
    Conder101, Sep 23, 2014
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