Australian 20c Clamshell Split Planchet Error
Some collectors of this sort of error may try to encourage the coin to separate completely through mechanical means or perhaps by repeatedly subjecting the coin to freezing temperatures. When the coin does split completely the result is the more typical sort of split planchet error seen in the first part of this series of articles.
Posted by mnemtsas at October 3, 2008 9:03 PM
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