A nice piece with well preserved details. Patina.
Obverse: bust of the emperor in laurel wreath and armor, to the right, in the rim legend:
L AVREL COMMODVS AVG
Reverse: Roma seated on throne to left, surrounded by legend:
TR P V IMP III COS II P P
Silver, diameter 17.5 x 19 mm, weight 2.8 g, axis 6 h.