Bronze antoninianus, 24mm, 3.07gm, issued AD 290-294. Antioch mint.
Obv: IMP C C VAL DIOCLETIANVS PF AVG, Radiate, draped and cuirassed bust facing right.
Rev: IOV ET HERC CONSER AVGG, Jupiter holding sceptre standing facing Hercules holding Victory and club.
Jupiter and Hercules were the 'mascot' gods of Diocletian and his companion Maximianus.