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<p>[QUOTE="ronnie58, post: 2975496, member: 90698"]OK thank you, previous two. It sounds like there is still a fairly wide gap in knowing exactly the methods actually being used. And moving target no doubt. </p><p> I'm sure the pros at the ANA, PCGS,NGC etc. can only judge by what comes across their desk, in terms of keeping up with new developments.</p><p> In terms of detection, the quote I copied above (12:18 p.m.today) led to a further discussion with that fellow. Please see if my synopsis about magnet testing rings true:</p><p> Saying the magnet test is "highly specific for fakes", we mean it is good for confirming that a genuine coin is indeed genuine. It is not likely to report a fake when the coin is genuine.</p><p> "Saying the magnet test is non-sensitive means that if a coin is fake the test might miss it. It might well report a coin as 'healthy' when it is a fake. It is prone to false negatives. </p><p> So the magnet test is not a great way to be sure, if in fact we are presented with a counterfeit."</p><p> Sure would be nice to have a weight on this coin![/QUOTE]</p><p><br /></p>
[QUOTE="ronnie58, post: 2975496, member: 90698"]OK thank you, previous two. It sounds like there is still a fairly wide gap in knowing exactly the methods actually being used. And moving target no doubt. I'm sure the pros at the ANA, PCGS,NGC etc. can only judge by what comes across their desk, in terms of keeping up with new developments. In terms of detection, the quote I copied above (12:18 p.m.today) led to a further discussion with that fellow. Please see if my synopsis about magnet testing rings true: Saying the magnet test is "highly specific for fakes", we mean it is good for confirming that a genuine coin is indeed genuine. It is not likely to report a fake when the coin is genuine. "Saying the magnet test is non-sensitive means that if a coin is fake the test might miss it. It might well report a coin as 'healthy' when it is a fake. It is prone to false negatives. So the magnet test is not a great way to be sure, if in fact we are presented with a counterfeit." Sure would be nice to have a weight on this coin![/QUOTE]
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Don't be tempted by this one . . .
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