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<p>[QUOTE=&quot;joecoincollect, post: 2428512, member: 71338&quot;]I think that holed dollar was cleaned, not recently though. Unless you were alive up to 170 years ago, you can&#039;t state it was never cleaned. In addition, Dave makes a good point about it being in contact with hands and skin to large extent since it&#039;s holed. Without any scientific mumbo jumbo involved, common sense tells me even minor alterations to coin surfaces affect toning. What&#039;s key is perhaps the period of alteration, since toning happens gradually. Whether it&#039;s a small piece of cardboard on a proof coin in a 2x2 holder or a coin in album, toning will be influenced[/QUOTE]</p><p><br /></p>

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