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<p>[QUOTE=&quot;KarlB, post: 2711195, member: 75549&quot;]Searching through quarters for my State/National Parks quarter collections, I came across this 2004-P Michigan State quarter. I asked several individuals what they thought might have caused this error, and the consensus was &#039;a strike-through.&#039;</p><p><br /></p><p>Further research, using Alan Herbert&#039;s <u>MINTING VARIETIES AND ERRORS fifth edition</u>, resulted in my categorizing this coin as an <i>INCLUDED GAS BUBBLE PLANCHET</i>.</p><p><br /></p><p>If anybody has other/more thoughts, please share them with me.</p><p><br /></p><p>Thank you.[/QUOTE]</p><p><br /></p>

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