Diocletian, Ticinum mint, officina 1, 290 AD.,
silvered Æ Antoninianus (22-24 mm / 4,27 g),
Obv.: IMP C VAL DIOCLETIANVS AVG , his radiate and cuirassed bust facing r.
Rev.: HERCVLI CONSERVAT / P XXI T , Hercules standing left, his right leaning on club, left arm holding lion skin and bow.
RIC V/2, 242, 217 (common) ; Coh. 137 .