I would wager XF (if real which I am certainly no expert just know they're faked often, I'm also not an expert at grading them just looks a little dull for AU could be wrong)
I am concerned about the authenticity. There are a lot of small pits in the field. Casting bubbles? Fake Trade dollars have been around for years. I bought one in the 70's with similar surface pits that turned out to be fake
AU 55 if they ignore the reverse scratch. They may not, depending on how deep it is. To me the coin is clearly better than XF.
45 or 50 if it grades clean. small amount of wear on hear and wing tips - too much for 55 - unless it's the strike - not magnified enough to tell for sure. That's my guess.
details look 45 to 50 to me also; the myriad of tiny ticks in the fields and the rev. scratch make me wonder if it would straight grade, though. I do think it is genuine.
