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<p>[QUOTE=&quot;John Anthony, post: 1621975, member: 42773&quot;]The following three coins are all certified by PCGS at MS66, and they are fairly representative examples of coins minted in their respective decades.</p><p><br /></p><p>The first one exhibits a great deal of chatter around the rim - something you see often in the 70&#039;s and 80&#039;s, particularly in P-mint coins.</p><p><br /></p><p><a href="http://postimage.org/" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://postimage.org/" rel="nofollow"><img src="http://s8.postimage.org/y4byfo84l/metalflow1.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></a></p><p><br /></p><p>In the 90&#039;s, the mint moves to a lower relief on this series, particularly concerning the high points of the cheek on the obverse and shield on the reverse. From 1992 on, there is generally still some chatter, but it&#039;s significantly reduced.</p><p><br /></p><p><a href="http://postimage.org/" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://postimage.org/" rel="nofollow"><img src="http://s9.postimage.org/6aaw9xda7/metalflow3.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></a></p><p><br /></p><p>By the time the satin finish collector coins come out, the chatter is all but eliminated.</p><p><br /></p><p><a href="http://postimage.org/" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://postimage.org/" rel="nofollow"><img src="http://s14.postimage.org/5ch875q8h/metalflow2.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></a></p><p><br /></p><p><br /></p><p>Now I understand that some of the hits on the earlier coins can be attributed to the packaging process, but my question is: can the striking process actually cause hairline fractures in the field?</p><p><br /></p><p>Notice the concentration of chatter around the date of the 71-P, where it&#039;s weakly-struck. I&#039;ve seen this pattern a number of times. Is it coincidence, or does a lower striking pressure in a particular area actually induce the micro-fractures in the field?[/QUOTE]</p><p><br /></p>

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