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<p>[QUOTE=&quot;Publius2, post: 7367441, member: 105571&quot;]After some additional reflection, I&#039;m hazarding a guess that these circumferential marks are lathe lines from when they turned the blank die.&nbsp; Why?</p><p><br /></p><p>- The lines are raised above the field of the coin (but not the devices) which means they would be incuse on the die and thus not polished out when the semi-finished die was polished.</p><p><br /></p><p>- They are too regular, wide, and deep to be die cracks or engraver marks.</p><p><br /></p><p>-&nbsp; They appear to be concentric with the coin&#039;s rim, thus the result of tool cutting/dragging/gouging into the die blank when the die was rotating about its center.</p><p><br /></p><p>-&nbsp; In my own machining work, this kind of gouge occurs when the tool is dull; or it doesn&#039;t have sufficient undercut of the cutting edge; or too big a cut is demanded for the tool&#039;s geometry; or the cutting bit doesn&#039;t have enough radial clearance; or the lathe&#039;s endplay adjustment of its spindle is not set correctly.</p><p><br /></p><p>Whatever the reason, it doesn&#039;t change my belief that the two coins posted are counterfeits off the same counterfeit die.</p><p><br /></p><p>[ATTACH=full]1283882[/ATTACH][/QUOTE]</p><p><br /></p>

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