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<p>[QUOTE=&quot;GDJMSP, post: 697195, member: 112&quot;]OK, let&#039;s clarify some things here. A sprue is the hole left in a casting mold through which the molten metal is poured into the mold. Typically it is on what will be the edge of the coin. And to prevent someone from seeing it an thus knowing that the coin was cast the sprue has to be filed down or tooled so that it disappears.</p><p><br /></p><p>That said, there are a couple different ways, several actually, that a coin can be cast. Well, it has more to do with how you make the casting mold actually. The easiest way, and the one that most people think of is to make the mold in 2 parts, one being the obv and the other the rev. Then the two pieces are placed together, the metal poured in through the sprue and the coin is cast. But this method leaves a tell tale seam all the way around the edge of the coin. It&#039;s pretty hard to make this seam disappear so that you can&#039;t tell it is a cast coin. Dang near impossible even.</p><p><br /></p><p>But there is another method that does not leave a seam around the edge. The only thing it leaves is the tip of the sprue itself to be filed down and removed. Now some call this the &quot;lost casting&quot; method because even though we know from documents that the ancients used to do it, the how of doing it was lost for centuries. </p><p><br /></p><p>Now I&#039;m not going to go into detail of how to do this and help some future counterfeiter out, (and please, don&#039;t anybody else do it either) but let&#039;s just say the method is no longer lost. It can be done.[/QUOTE]</p><p><br /></p>

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