I'm going to go with MS-64 and assume that the discoloration on Columbus' cheek is just that and not wear. The obverse with the toning looks to be fully UNC.
The thick dark toning on the reverse appears to have muted the luster. I think the reverse has negative eye appeal, countered by the attractive obverse. The strike seems sorta weak, especially on the obverse, and the obverse fields look sort of hazy. All of these combine to make this a 63 in my opinion, grading solely from these pictures. If the reverse luster is strong in hand, it may have gotten a 64.
Im gonna go 64 as well Just a touch too much chatter in the field for a gem grade imo. In other news Ed is back