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<p>[QUOTE=&quot;Info Sponge, post: 900910, member: 20538&quot;]The 2009 Ultra High Relief double Eagle shipped with a book that goes into fascinating detail about how the dies were prepared, and has a web site with the same kind of information.</p><p><br /></p><p>Both mention that the coin was not economically strikeable with the technology of the early twentieth century. Both are oddly short of information about what happens in the manufacturing process after the working dies were produced for the 2009 coin.</p><p><br /></p><p>So what was different about striking it that made it feasible in 2009? Is it just that the 2009 coin was 24K and therefore easier to squish in a press? Did die design actually have a bearing on it, given that they used finite element analysis to design out stress concentrations? Do modern presses apply more pressure?[/QUOTE]</p><p><br /></p>

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