Hard to tell a grade without seeing both obverse and reverse.
If the obverse is as nice as the reverse, it could be a AU coin.
If it had a mint mark it would be on the other side of the coin
from the AW. It is a Philadelphia mint coin so
no mint mark.
I think your seeing what might be a error on the designer initials.
It does look a little off .... not sure if it is a known error.