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All Forums Category: General Numismatic Forums Forum: Third Party Coin Grading (TPG): PCGS, NGC, ANACS, ICG, ETC.

Does Grading Change Over Time If Stored Properly?

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dbrablec
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 Posted 09/07/2016  3:05 pm  Show Profile   Bookmark this reply Add dbrablec to your friends list Get a Link to this Reply
iread an article about a Lincoln Cent (zinc composition) braded MS 70 by one of the top grading services) that sold for many thousands of dollars at an auction.. it later deteriorated in the encasement.

i did not ever find out the putcome of the value/deterioration value. but my opinion is that YES a coin can change grade/value even after being graded and encapsuled in a good holder.

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jbuck
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 Posted 09/07/2016  3:11 pm  Show Profile   Bookmark this reply Add jbuck to your friends list Get a Link to this Reply
They offer more protection than raw coins, but slabs are not completely air tight. Over time a slab can (and will) be infiltrated by the environment.
Coin Collector Since 1978Does-Grading-Change-Over-Time-If-Stored-Properly?AvatarDoes-Grading-Change-Over-Time-If-Stored-Properly?Old AvatarDoes-Grading-Change-Over-Time-If-Stored-Properly?7070Does-Grading-Change-Over-Time-If-Stored-Properly?EisenhowerDoes-Grading-Change-Over-Time-If-Stored-Properly?AustraliaDoes-Grading-Change-Over-Time-If-Stored-Properly?CanadaDoes-Grading-Change-Over-Time-If-Stored-Properly?WorldDoes-Grading-Change-Over-Time-If-Stored-Properly?CCF Members on eBayDoes-Grading-Change-Over-Time-If-Stored-Properly?CCF eBay Search Engine
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