Grading this coin won't help add value in this case. The value in a 90-CC in a GSA holder is THAT it's still even in the GSA holder! Many, many coins were busted out of their plastic during the slabbing insanity of the 1980's.
Of the 4000 90-CC's that were sent out, I'd bet that less than half are still in their GSA plastic.
An original 90 or 91 CC in the original plastic and box with the original serial numbered card is expensive. Worth multiple times what a non GSA holdered coin is.
This is one case where original "everything" counts big time! Don't mess with it, enjoy it as it was meant to be seen!
Of the 4000 90-CC's that were sent out, I'd bet that less than half are still in their GSA plastic.
An original 90 or 91 CC in the original plastic and box with the original serial numbered card is expensive. Worth multiple times what a non GSA holdered coin is.
This is one case where original "everything" counts big time! Don't mess with it, enjoy it as it was meant to be seen!


















