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<p>[QUOTE=&quot;GDJMSP, post: 360665, member: 112&quot;]Yes and yes. The black stuff you mention could be just dirt and grime accumulated through normal circulation or it could be black toning. But trying to clean the coin with soap &amp; water is always - always - a bad idea. Soap leaves a film (sticky) residue on coins that only tends to collect more dirt. It can also cause unsightly toning over time.[/QUOTE]</p><p><br /></p>

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