Ah OK, the same colour has fooled me.
About the coin:
The first picture shows a standing figure who places her left hand on a
shield set on ground, and a second figure next to it with her
arm raised. This might be an emperor standing, crowned by
victory ??
This depiction is often found on late
roman folles, but the
obverse looks not like an official emperors
bust. Inofficial?? Or something completely different ??