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<p>[QUOTE=&quot;GDJMSP, post: 300607, member: 112&quot;]Polishing a coin, over-dipping a coin, or dipping a coin too many times - all of these will remove mint luster. And of course harshly cleaning a coin will as well.</p><p><br /></p><p>As to how you tell - you tell just by looking at it. It&#039;s an experience thing, hard to describe but you know it when you see it. Just like you said, you can tell the coin does not have the luster - so either the coin is so worn that there is no luster left or one of the above was done to it.</p><p><br /></p><p>As to which one it was - it doesn&#039;t really matter since they all damage the coin in the same way.[/QUOTE]</p><p><br /></p>

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