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<p>[QUOTE=&quot;poppa501, post: 1288325, member: 20945&quot;]&quot;&nbsp; Hi Chris,</p><p>Mint regulations stated that all dies originated with the engraving&nbsp; department at the Philadelphia Mint. The other mints did not have&nbsp; engravers and were not authorized to buy the necessary engraving tools&nbsp; and punches. That does not mean someone didn&#039;t bring tools from home.</p><p>&nbsp;</p><p>SF hardened its own dies until the 1890s and there is one instance where it was suggested that they added an &quot;S&quot; mintmark.</p><p>&nbsp;</p><p>Carson also had equipment to harden dies, but it&#039;s not clear to me if they did this or not.</p><p>&nbsp;</p><p>During the 1870s, engraver William Barber was noted to have sent out&nbsp; dies that were defective, lacked a date, etc. He probably send out ones&nbsp; w/o mintmarks, but I&#039;ve not seen a specific letter.</p><p>&nbsp;</p><p>The O/CC reverse dies did not go from Carson to NO. The went to&nbsp; Philadelphia first for several years, then to NO - possibly as &quot;test&nbsp; dies&quot; used as the Phil Mint engineer friend to identify why NO was&nbsp; having very short die life.</p><p>&nbsp;</p><p>Of course, the negative cannot be proven.</p><p>&nbsp;</p><p>Roger&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <p style="text-align: left"><span style="color: #000000"></span></p> <p style="text-align: left"><span style="color: #000000">Read more: <a href="http://www.cointalk.com/t193999/#ixzz1bqyr4eUv" class="internalLink ProxyLink" data-proxy-href="http://www.cointalk.com/t193999/#ixzz1bqyr4eUv">http://www.cointalk.com/t193999/#ixzz1bqyr4eUv</a> &quot;</span></p> <p style="text-align: left"><span style="color: #000000"><br /></span></p> <p style="text-align: left"><span style="color: #000000">Did the mint change its regulations at some point?&nbsp; I mean how do we explain all those RPM&#039;s?&nbsp; Not the D over S etc., but the regular RPM&#039;s?&nbsp; These occur on most denominations and most years.&nbsp; Or did all the mints just ignore the regs?&nbsp; Since these are common errors, it seems to lend more credence to the supposition that the branch mints punched their own mintmarks.</span></p> <p style="text-align: left"><span style="color: #000000"><br /></span></p><p>[/QUOTE]</p><p><br /></p>

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