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<p>[QUOTE=&quot;desertgem, post: 3511388, member: 15199&quot;]For coins before the advent of single squeeze hubbing, the mintmark was added after the completion of the hubbing as most dies were made in Philadelphia and shipped to the Denver and San Francisco mint where the mm was added before use. Since it was by hand the force applied by the workers hammer decided its depth in the die and thus its height in the finished coin, so although the difference is usually too small to measure, it is realistic that some difference in height on the coin is to be expected.</p><p><br /></p><p>Single squeeze coins as I see explained, the mm is added in the computer engraving of the master die , all at the same time. </p><p><br /></p><p>When looking for varieties such as DD or RPMs, one MUST know if they are single squeeze ( usually after 1995) although a little experimentation was done earlier, or the older classic and true DD before. Too many people are trying to identify DD and RPM on single squeeze coins by the characteristics of the older multi-squeeze coins and rpms similarly. IMO&nbsp;&nbsp; Jim[/QUOTE]</p><p><br /></p>

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