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<p>[QUOTE=&quot;dchjr, post: 2979877, member: 76379&quot;]The picture with the &quot;Quality Alert&quot; sign was for the die-hubbing press. Doubled dies are created during the hubbing process.&nbsp; If the hubbing process is interrupted and the die &#039;shifts&#039; and then the process starts back up, it could create a doubled die. This &#039;error&#039; has been verified and reproduced by the mint to create doubled dies.&nbsp; </p><p>This is an excerpt on how a Doubled Die was created during the single-squeeze hubbing process from Wexler&#039;s&nbsp;&nbsp; <a href="http://doubleddie.com/58222.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://doubleddie.com/58222.html" rel="nofollow">http://doubleddie.com/58222.html</a></p><p><br /></p><p><i><font size="4">&quot;On October 1, 2009 I had the privilege of having a telephone conversation with George Shue, Senior Advisor in Manufacturing at the U.S. Mint.&nbsp; During this conversation the 2009-D Washington D.C. quarter with a major doubled die reverse came up.&nbsp; Mr. Shue noted that the Mint was aware of this doubled die error and how it occurred.&nbsp; This particular doubled die resulted when a hubbing press operator stopped one of the single-squeeze hubbing presses to realign the hub and die and then restarted the hubbing sequence.&nbsp; In the process a rotational misalignment of images resulted.&nbsp; Mr. Shue further noted that the Mint was able to reproduce the error in a test to see what caused the doubled image originally.</font></i></p><p><i><font size="4"><br /></font></i></p><p><i><font size="4">The conversation further revealed that the Mint was aware that even though it was contrary to policy, hubbing press operators were taking it upon themselves to sometimes stop the single-squeeze hubbing presses before the hubbing was completed to make adjustments, and then restarting the press to complete the hubbing.&nbsp; To prevent doubled dies like the major variety seen on the 2009-D Washington D.C. quarter from happening again, the Mint has installed “locks” on the hubbing presses.&quot;</font></i>[/QUOTE]</p><p><br /></p>

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