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<p>[QUOTE=&quot;GDJMSP, post: 3047117, member: 112&quot;]I have looked in all the books, both US and French, and I could never find anything written that explains a way. And since the original dies were used there are no strike diagnostics that help. But I have to wonder if perhaps the color change you mention would not be the key to telling the difference. Here&#039;s some examples I used to own, an &#039;07 and an &#039;08 to compare.</p><p><br /></p><p>[ATTACH=full]761575[/ATTACH] [ATTACH=full]761576[/ATTACH] </p><p><br /></p><p><br /></p><p><br /></p><p>[ATTACH=full]761577[/ATTACH] </p><p>[ATTACH=full]761578[/ATTACH] </p><p><br /></p><p><br /></p><p>The color difference of the restrikes is explained by the alloy used. The originals had a gold and silver alloy while the restrikes had a gold and copper alloy - that&#039;s why the one has a yellowish cast and the other a reddish cast. Gold content in both is the same.</p><p><br /></p><p>That said, you can&#039;t use color alone as a definitive method because toning can also account for color. However, a couple of years ago Tyler&#039;s Museum in the Netherlands ran modern, non-destructive test (using XRF) on approx 300 of the Netherlands gold ducats in their collection to determine the actual gold fineness of the coins. The results were quite interesting indeed, and impressive, but that&#039;s another story. </p><p><br /></p><p>My point is that XRF technology can tell you the various metals content in very precise numbers and with very degree of accuracy. So, if one were to use an XRF on Roosters, then you could tell which was a restrike and which was original by determining the silver vs copper content. And it would be definitive.</p><p><br /></p><p>It&#039;s a rather simple test that only takes seconds per coin and anyone with an XRF could do it.[/QUOTE]</p><p><br /></p>

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