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Message:: [QUOTE="iPen, post: 2315543, member: 69760"]According to <a href="http://www.coinauctionshelp.com" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.coinauctionshelp.com" rel="nofollow">www.coinauctionshelp.com</a> with excerpt below, it emphasizes how differently proof and business strike dies were prepared: "A Deep Mirrored coin will display shallow "striations" in the fields from when the metal was stretched or thinned as it was squeezed between the dies. These striations must not impede the reflectivity in the fields for a Morgan to be DMPL, but most were polished off during the basining process so the mirror fields will display greater reflectivity at greater distances. Below is an example of a true Deep Mirror Proof Like Morgan Dollar. <img src="http://coinauctionshelp.com/dmpl-plcoins/1885-o-pcgs-65dmpl.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /> In other words, a Proof Morgan Dollar was struck with a specially prepared Proof die, and a DMPL coin was not. With experience the collector will be able to distinguish the different characteristic(s) between the die strikes so as not to confuse a Proof with a DMPL coin. However, PR Morgan Dollars are rare, so the main point is distinguishing between coins with "normal" and striated fields and deeply reflected mirrored fields."[/QUOTE]