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<p>[QUOTE=&quot;GDJMSP, post: 16639, member: 112&quot;]In this case I think this bubble was caused by someone with a torch instead of the striking process. </p><p><br /></p><p>In the other recent thread on this subject - the entire coin was toned fairly evenly - except the bubble. In this example - only the bubble is dark. </p><p><br /></p><p>So in the first case - the bubble is light colored because it is raised and therefore the toning is worn off due to surface rub on the high spot. In this case - since only the bubble is dark and the rest of the coin fairly light colored - this leads me to believe that heat has been applied recently and caused the bubble.</p><p><br /></p><p>Just my opinion.[/QUOTE]</p><p><br /></p>

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