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<p>[QUOTE=&quot;pennylman1973, post: 3046935, member: 94559&quot;]Sorry for my ignorance but if his machine can detect what type of metal is in the center of a coin, or like a small bar of gold (his words), I wonder why it would come back as zero copper content if its a copper cent that has been tampered with?</p><p><br /></p><p>To demonstrate his machine to me he scanned/zapped/analyzed (whatever the proper term is) a newer cent that was zinc plated in copper. The machine came back saying it contained both metals.&nbsp; </p><p><br /></p><p>On mine however it came back just zinc. He told me the machine could see through plating and also detect the core metal. He was more puzzled than i was on the results.&nbsp; He initially assumed it was a zinc coated copper penny but after he scanned it he said that wasn&#039;t a possibility.[/QUOTE]</p><p><br /></p>

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