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<p>[QUOTE=&quot;Michael Townshend, post: 3169330, member: 97630&quot;]Don&#039;t workers at say,... PCGS know if a lens was opened?&nbsp; Or are they not concerned about the specific set when it comes to general proof sets? </p><p><br /></p><p>You would think that there would be some glue that would show signs of breaking if it was ever opened. Which means that the lens is 2 pcs of plastic with snap on type lens&#039;? </p><p>I also wonder about the mint and their desire to produce a set that is tamper proof (preserve provenance, make the COA real?), but from what I hear, these all can just be pried open, coins swapped out?&nbsp; I&#039;d be afraid to do that, unless I wanted at the coins themselves, but that&#039;s definitely a topic for another thread.</p><p><br /></p><p>Guess that&#039;s why there are a bunch of sets floating around with what looks like 1 coin out of place...&nbsp; I thought it was just the aging, but most likely I assume the coin was swapped?</p><p><br /></p><p>Was curious if anyone might know something about this, I know it&#039;s off topic, but read it mentioned here a few times...[/QUOTE]</p><p><br /></p>

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