The 1910 can be especially difficult to grade from photos because of the prevalence of buckling of the dies that year. Based on what luster I can see, and an apparent lack of significant marks, I think MS63 as well.
The head bonnet looks worn but there is no corresponding wear on the reverse. 1910 $2.50 are a tough year to grade and from photos it's always harder. I'm going to say MS-64. I know I'm higher than anyone else but it's a great looking coin and I love this series.
