I believe this coin no longer in the MS67 holder that is shown in the photo and it is owned by NGC in a MS66 holder as NGC bought it back after is was conserved. If you check the NGC web site cert number on the MS67 it notes no longer graded. The highest graded 1893 S on the NGC population report is a single MS66 that is most likely this coin. You can read about the history of the coin below.
Below is a article written by Greg Reynolds about the coin:
The Norweb 1893-S was known for wonderful, original gray and russet toning. It is also true that it scores high in the technical category; there are minimal abrasions. It was submitted to PCGS in 1988, soon after the Norweb III auction in New York. Two PCGS graders favored assigning a grade higher than MS-67 to this coin! Most experts, though, assigned a grade in the middle of the MS-67 range to the Norweb 1893-S. In my view, it would merit a grade of around 67.5 or 67.6 now, if it had never been 'conserved,' though no one should take grades to the tenth of a point too seriously.
As I reported to the coin collecting community in Nov. 2008, the Norweb 1893-S was unfortunately 'conserved' in the mid 2000s. After it was 'conserved,' and forever changed, it was returned by NGC to a holder with a "MS-67" grade. No expert I know continued to believe that it still merited a grade of "MS-67."
The original toning was forever destroyed. The coin became characterized by a nearly uniform, gray-white chalk color, which appeared unnatural and irritating. Hopefully, it has since naturally retoned to a noticeable extent.
Heritage offered the Norweb 1893-S at auction in April 2008, though it did not then sell. The Norweb 1893-S was last publicly seen when Heritage auctioned it in Aug. 2011 for "$546,250." A very reliable and appropriate source indicates that NGC was the successful bidder at that Heritage auction, though it may be that NGC purchased the Norweb 1893-S from the successful bidder. Either way, NGC 'bought it back' and reduced its grade from "MS-67" to "MS-66."
If the Norweb 1893-S had never been conserved, it would have sold for at least $850,000 in Aug. 2011, probably more than $1 million, maybe as much as $1.25 million! Although it is now in a holder with a "MS-66" grade, relevant experts who I know graded it as "MS-65" in 2011.
As the Norweb 1893-S has such an incredibly small number of abrasions, which are hardly noticeable, could any leading dealer in Morgans grade it below 'MS-65'? It is not unusual for a very unnaturally white
Morgan dollar to be assigned a MS-65 grade via the application of generally accepted grading standards.