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<p>[QUOTE=&quot;BadThad, post: 1171505, member: 17261&quot;]Sorry for the multiple part answer...but you ask some tough questions.</p><p>&nbsp;</p><p>You absolutely CANNOT compare a 1959 to a 2008. There were a lot of significant design changes made over the course of the LMC series. The evolution created completely different coins over the years.</p><p>&nbsp;</p><p>The spots are due to the metalworking fluid and the post-production rinse to remove the fluid. It&#039;s something us LMC collectors are forced to deal with. I suspect they are more prevalent on newer issues because they produced more coins and increased the time they used the various fluids for. Over time, the fluids become contaminated with dirt, bacteria and metal fines. Eventually, they become very dirty and start leaving spots after drying on the coin surface. These spots CANNOT be removed without damaging the coin....I have tried everything at my disposal to address them (I am a chemist in the metalworking fluid industry)....they are permanent.[/QUOTE]</p><p><br /></p>

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