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<p>[QUOTE=&quot;GoldCoinLover, post: 698497, member: 4336&quot;]So I know that die polish is generally a sign that a coin is genuine. And I also know its often found in protected areas, such as the date, on certain devices, and crevices. Sometimes I&#039;ve heard it is swirly, other times I have seen it straight. But they do appear to be finer, thinner than tool marks. The reason I ask this is I took out my $5 PCGS AU58 indian head eagle for examination. I notice what appears in the neck of the indian to be fine die polish lines, also right below the neck band. It is obviously genuine since both ANACS (the old ANACS in the small holder), and PCGS slabbed it. Am I correct on this assumption to tell the difference between the two?</p><p><br /></p><p>My other question is, what exactly causes spikes from the denticals? I seem to remember somewhere it was from a certain die making process (EDM?), perhaps from spark erosion dies?</p><p><br /></p><p>And I encourage other people to post in this thread to post any questions they have on authentication in general, including alterations. I think Matt&#039;s Thread is a real eye opener on the subject and I think we all need to ask more questions, and I think that&#039;s a great way to learn, as well as looking at many genuine coins, understanding how counterfeit coins are made, knowing what genuine coins look like, understanding how genuine coins are made, and understanding the diagnoses of counterfeit coins.</p><p><br /></p><p>Here is the photo I took of the coin a couple years ago, and I think what&#039;s shown here is die flow lines (not die polish lines):</p><p><img src="http://i10.photobucket.com/albums/a134/spacetimecont/idia2.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><img src="http://i10.photobucket.com/albums/a134/spacetimecont/idia1.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" />[/QUOTE]</p><p><br /></p>

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