Late to the party, but wow. I was at 64 no-FS myself. No way that's a 66! While I really like the presentation of the set (and wish NGC would go back to doing these), every single grade on there appears to be at least one point too high.
Yeah, it's almost as if they gave the entire set a grade bump as a reward for being an original set. I wouldn't doubt that that probably happens.
This coin was submitted to NGC and graded MS65 5FS. I don't have a slab photo but the certification # is 5931953-001 and I linked the cert verification below. Jefferson Nickel 1957 NGC MS65 5FS 5931953-001
Was it worth it to crack out of the Anacs mint set slab? I would think most of those coins would sell for less once outside of the original mint set (unless something else in there received a high grade).
I honestly don't think there is a huge collector market for original mint set coins. I think collectors who want that tend to gravitate towards mint sets in original packaging.
It was in original packaging (slabbed in one of those Anacs/OSV cases which includes the entire original set-only one board was shown; these are slabbed by the board and the envelope is sealed separately). Ok; if enough coins get the right grade, then it is worth it. And even if it's not worth it financially, but he liked the coin and wanted it in his set, then that makes sense too.
He bought a 1957 double mint set graded by ANACS/OSV and like you said the envelope was included, but what I haven't shown is the 57-D board. That is the reason he bought the set and he did pretty well with the coins he submitted to PCGS. Washington Quarter 1957-D PGCS MS66+ PCGS Photo: My Photo: Franklin Half Dollar 1957-D PCGS MS66 FBL PCGS Photo: My Photo: Franklin Half Dollar 1957-D PCGS MS66 PCGS Photo: My Photo: He broke the 57-D set up and sent the major coins in for submission. We tried to sell the 57-P set with the envelope on eBay but got no interest at all so he eventually decided to break that open as well.