Most of the GSA dollars I have seen in the MS-61 to 63 range. It's rare to see a really high grade one. These coins were stored and bags and moved...
That would have been more than enough to re-tone the coin over time after it had been cleaned. There surfur in the paper, which darkens silver.
The sharpness grade is EF, but as I posted earlier, I think that it has been cleaned with a mild abrasvie at some point. This was done to a lot...
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