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<p>[QUOTE=&quot;Curtis, post: 24866718, member: 26430&quot;]Not a video, but this series illustrates it pretty well with text and diagrams.</p><p>Dave Welsh&#039;s (Temecula, CA) ClassicalCoins.com website no longer exists, so you have to see it in the Wayback Machine:</p><p><br /></p><p><a href="https://web.archive.org/web/20150924041232/http://www.classicalcoins.com/flans1.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://web.archive.org/web/20150924041232/http://www.classicalcoins.com/flans1.html" rel="nofollow">https://web.archive.org/web/20150924041232/http://www.classicalcoins.com/flans1.html</a></p><p><br /></p><p>Keep clicking &quot;NEXT PAGE&quot; (bottom left) from <a href="https://web.archive.org/web/20150924041232/http://www.classicalcoins.com/flans1.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://web.archive.org/web/20150924041232/http://www.classicalcoins.com/flans1.html" rel="nofollow">Flans1.html</a> through <a href="https://web.archive.org/web/20150924040408/http://www.classicalcoins.com/flans8.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://web.archive.org/web/20150924040408/http://www.classicalcoins.com/flans8.html" rel="nofollow">Flans8.html</a>.</p><p><br /></p><p><a href="https://web.archive.org/web/20150924045211/http://www.classicalcoins.com/flans5.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://web.archive.org/web/20150924045211/http://www.classicalcoins.com/flans5.html" rel="nofollow">Flans5</a> is where it starts picking up, and you can start there if you have the basic idea, and <a href="https://web.archive.org/web/20150924045620/http://www.classicalcoins.com/flans6.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://web.archive.org/web/20150924045620/http://www.classicalcoins.com/flans6.html" rel="nofollow">Flans6</a> is where the diagrams start.</p><p><br /></p><p>Keep in mind, we&#039;re not 100% certain how they did it, and it&#039;s observed over about 500 years of coins across a wide geographic range, so there were surely improvements and variations in the tech.</p><p><br /></p><p>But this is the most plausible explanation of the observed data:</p><p><br /></p><p><img src="https://web.archive.org/web/20150924045620im_/http://www.classicalcoins.com/media/Research/flansimage015.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" />[/QUOTE]</p><p><br /></p>

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