Probably sneaks into an AU-50 technical grade based on remaining luster and a very nice reverse. Faint signs of an old cleaning might "detail" the coin, or generate a net XF-45 straight grade. Agreed, very tough date. If price were not a concern this is the date I'd like for a "no motto, with arrows" type coin!
@Heymikep, I'm a little late to the party here. AU-50 certainly is a reasonable grade for this one. It has solid eye appeal. What a tough coin in any grade. Your coin has rock solid eye appeal. That's a beaut!
This would be an interesting coin to net grade if my "AU slider" option of EF-48 comes to pass.
I agree that the obverse has a little more evident wear than an AU-50 should have. That reverse, though, is fantastic. I wonder if the reverse could snag it a bean?