I don't have a lot experience yet, but I'm rather sure this is a
fake. People already pointed out the brown colour, it's also a
bit visible on the
obverse letters. And the seam looks really wrong on a lot of places. And I can't say what's wrong with the
style from the
reverse, but it looks borderline
fake to me, it just doesn't feel right (although it's close to the normal
style).
Edit: I looked at it again, and it looks like the
obverse is cast using a real coin. The
reverse looks like it was carved on a flat surface (that may explain the strange
style). You can see a depression around the letters and the figure. The surface looks really flat and the seem doesn't look like one from a struck coin (
reverse flan looks almost completely round, with the
obverse flan sticking out from beneath). But it's just a theory off course.