A nicely preserved piece.
Obverse: bust of the emperor wearing a radial crown and armor, to the right, surrounded by a legend:
IMP C M VAL DIOCLETIANVS P F AVG
Reverse: Hercules holding Victoria facing Jupiter , in the rim legend:
IOV ET HERCV CONSER AVGG, in segment XXI, in field */E;
Bronze, diameter 21 mm, weight 4.71 g, axis 6 h.