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<p>[QUOTE=&quot;mikenoodle, post: 2682714, member: 307&quot;]funny... funny...</p><p><br /></p><p>My point is that if you market grade, don&#039;t expect the grades to stay the same over time. A TPG grades coins and as far as I know, the slabs that they produce are made to last for years on end.</p><p><br /></p><p>Grades (in the concept of a state of preservation) are constant. Markets are fluid.</p><p><br /></p><p>That said, if the grade on the coin is only good for a limited time, the slab should have a freshness date, or should disintegrate after a short time.[/QUOTE]</p><p><br /></p>

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