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<p>[QUOTE=&quot;Coinchemistry 2012, post: 2043178, member: 28107&quot;]I&#039;m not going to rehash the entire debate again here, but among other misconceptions concerning die polish lines including whether they can traverse the devices, see this thread <u><a href="https://www.cointalk.com/threads/ceaning-or-die-polish.256575/page-2" class="internalLink ProxyLink" data-proxy-href="https://www.cointalk.com/threads/ceaning-or-die-polish.256575/page-2">https://www.cointalk.com/threads/ceaning-or-die-polish.256575/page-2</a></u>.&nbsp; A more informative version appears on the NGC forums and contains contributions from at least three authors of well respected coin books or coin periodicals and at least three who either are or were associated with a top 3 third party grading service,&nbsp; <u><a href="http://boards.collectors-society.com/ubbthreads.php?ubb=showflat&amp;Number=8239230&amp;fpart=1" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://boards.collectors-society.com/ubbthreads.php?ubb=showflat&amp;Number=8239230&amp;fpart=1" rel="nofollow">http://boards.collectors-society.com/ubbthreads.php?ubb=showflat&amp;Number=8239230&amp;fpart=1</a></u> (the good part starts after the first 2-3 pages or so). I also recommend reading Roger Burdette&#039;s <u>From Mine to Mint</u>.&nbsp; Insofar as the referenced poster (the former NGC grader and cameo CAC grader), he remarked that it was common particularly in the Barber series in the shallow part of the devices.</p><p><br /></p><p>And as far as my personal experience, one of the areas that I collect heavily is proof coinage from 1936-1942, which often display die polish lines.&nbsp; One of the chief complaints when proof coinage of this era was released was concerning the appearance of some satin proof coins.&nbsp; Collectors at the time preferred brilliant coinage associated with the pre-matte proof era.&nbsp; The Mint began to heavily polish all of the dies to restore brilliant proof coinage.&nbsp; As such, it is very common for the dies to have been overpolished and the resulting coins will have heavy die polish lines often on the devices.&nbsp; Moreover, the dies were polished so heavily that often minor design element details were obliterated in the process.&nbsp; This would seemingly only be caused conceivably by die polish as more substantive repairs or other processes that some attempt to distinguish from die polish lines would have had more profound effects on the resulting coinage.&nbsp; Moreover, the lines are raised and fine, suggesting that they are die polish.&nbsp; And again, remember that the dies were heavily polished with the intent to effect a brilliant finish on the resulting coinage, so there is a clear reason for these lines being so common on coinage of this area (and these are NOT cleaning hairlines - statistically what are the odds that a sizeable portion of the total mintage was cleaned and happened to have&nbsp; the <u>exact same pattern</u> of lines?).&nbsp; I don&#039;t know how anyone could logically call them anything other than die polishing lines.&nbsp; Now, you mention a large polishing wheel.&nbsp; Proof coinage of this era and PL coinage suggest that this isn&#039;t the sole method.&nbsp; RWB&#039;s post ATS starts to go there, but doesn&#039;t develop it as far it could.[/QUOTE]</p><p><br /></p>

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