Frankly, I will pass on this one. I have a few issues with the toning otherwise the coin itself looks great.
I would call it 50/50; there is a chance it makes it but I can also see it getting the dreaded questionable color. I actually had a somewhat similar Mercury grade at ICG recently:
Looks NT to me. The obverse looks like an end roll toner, but you don't usually see a fully toned reverse on an EOR toner. I would be more worried that it has been cleaned than the originality of the toning.
Agree with NT end of roll coin. But I have also seen this result on coins in the Blue Whitman tri-folders from my own collection. When I saw this I removed all of them out and into capsules, mylar or 2x2 flips. The Whitman folders were an easy and inexpensive way to collect, organize and store your collection but they didn’t prevent fingerprints, discoloration and oxidation (toning).
That’s a beautiful coin and my first thought is NT. However, I can also see it may grade the AT way but I’m sticking with NT.