MS-63. There are some obverse rim nicks at K3 and some cheek marks. Reverse has numerous small dings on the bison and one in the field between the bison's beard and front leg. These, along with a weak strike drag it down a bit, IMHO.
Money on a hoof, as we say around the oval. Gem going away. Give this Bison MS66 if these dark pics are true to the grade.