A higher grade than the 1910 10 Cents. Luster is fading underneath the toning, but that doesn't affect the grade.
With George V, you look for wear on top of the ear and also mustache and beard. Beware that light strike or worn die can affect the sharpness of detail in these areas.
That can make them hard to differentiate between AU-58 or MS-61. Need a high powered loupe to look for wear, to be able say so, either way. When doing so, look for undisturbed luster under the toning on the high points of the design, both sides.
I will say AU-58 in his case, but it could go as high as MS-62.