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<p>[QUOTE=&quot;SuperDave, post: 2613781, member: 1892&quot;]My apologies; I thought you were familiar with the technology. It&#039;s limited in terms of how deep it can go into metal, really thick plating can defeat it although more powerful, more expensive machines can vary that. They&#039;re available handheld these days. At Winter FUN 2013, I watched a guy demonstrate it with a slabbed counterfeit gold coin; nailed the alloy composition from outside the slab. It was a coin not previously known to be counterfeit....</p><p><br /></p><p>The cost of the tech is coming down but good handhelds are just breaking under $10k these days. No doubt in my mind the TPG&#039;s have had good table models for years.[/QUOTE]</p><p><br /></p>

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