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<p>[QUOTE=&quot;GDJMSP, post: 64393, member: 112&quot;]No they cannot be opened easily and the coin switched. Slabs from NGC, PCGS, ANACS and ICG are all sonically sealed. What that means is that the 2 plastic halves of the slab are actually melted together by using sound waves to melt the plastic. Once sealed the slabs are tamper proof. They cannot be opened without destroying the slab or altering it in such a way that is not readily visible.[/QUOTE]</p><p><br /></p>

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