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<p>[QUOTE=&quot;GDJMSP, post: 1255786, member: 112&quot;]There&#039;s more to it than just identifying the flow lines though. But even if flow lines were the only thing involved, there would still be differences because of the very nature of flow lines. Because the metal flows across the surfaces of the die it wears on the die with each strike. So even though 2 successive coins will be similar, they will not be identical. The process also identifies and records even the most minute contact mark and all strike characteristics. </p><p><br /></p><p>Think about it, contact marks - from the first coins ever struck in the 1700&#039;s to those of today, when the coin leaves the press it is tossed into a pile or into a hopper. And every subsequent coin lands on those previous coins. That causes contact marks on every coin. Then there is all of the other possible contacts from handling, like counting and sorting and bagging and distribution. Every single coin goes through this and always has. And that&#039;s just for the MS coins. Coins that have seen circulation have even more differences.</p><p><br /></p><p>Then there are strike characteristics. Every coin struck is unique in this regard alone, let alone the others. For with every strike there is a multitude of things that can change. The planchet can be a tiny bit thicker on one side or the other. Or this planchet will be slightly thicker or thinner than that planchet. The strike pressure will vary slightly. The dies can move or shift slightly in the press between strikes. The dies can bounce upon strike. And wear will cause one particular spot on the coin be struck up better than on another coin.</p><p><br /></p><p>So between these 3 things it is impossible for any 2 coins to be identical.</p><p><br /></p><p>Just like a human&#039;s fingerprints are 100% unique, every single coin is also 100% unique. That&#039;s why the process works, and that&#039;s why they have had a 100% success rate.[/QUOTE]</p><p><br /></p>

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