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<p>[QUOTE=&quot;Doug21, post: 1569356, member: 5650&quot;]and no copper coin like an IHC will be red forever....unless some sort of airtight slab filled with an inert gas like Nitrogen is developed,,,, version 1 is surely under R&amp;D,</p><p><br /></p><p>So expect gas filled slabs pretty soon....so everything high-end can migrate to those !</p><p><br /></p><p>Maybe one for the other Doug ( Gdmsq or whatever) . ..</p><p><br /></p><p>Will a coin stop toning in an inert sealed gas slab&nbsp; ?&nbsp; I think it would, can&#039;t oxidize without O2, right ?</p><p><br /></p><p>Then there will be a new and improved one a few years later....PCGS has to find a way to keep re-grading the same coins every few years afterall....[/QUOTE]</p><p><br /></p>

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