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<p>[QUOTE=&quot;900fine, post: 205767, member: 6036&quot;]In PCGS slabs, the coin is surrounded by a flexible O-ring... it&#039;s kinda like silicone rubber. I don&#039;t know the exact material. It seems like these would be the easiest to slide around the coin with minimal surface contact.</p><p>&nbsp;</p><p>In NGC&#039;s slabs, the coin is surrounded by a much more rigid material. Seems more difficult to get in / out without significant surface contact.</p><p>&nbsp;</p><p>So yes - the act of slabbing (or cracking out) involves some impact to the coin - very small, but non-zero.[/QUOTE]</p><p><br /></p>

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