At first glance I thought vf25 right away,but upon closer inspection I believe this coin to have been weakly struck,therefore getting a higher grade then what the consensus feels is right. I'm going to take a guess at a Au52 and if its not weakly struck then I am at a vf35-xf40 range.
Anyway a lovely piece to have nonetheless and even better is it has a fancy mintmark on the back which adds to its intrigue.