Diocletian (284-305) AE Antoninianus (Bronze, 23mm, 3.51g) Cyzicus,
Obv: IMP C C VAL DIOCLETIANVS AVG, radiate, draped bust of Diocletian right, seen from behind
Rev: CONCORDIA MIL-ITVM, emperor standing right, short scepter in left hand receiving with right Victory on globe from Jupiter standing left, scepter in left hand; B between, XXI• in exergue.
Ref: RIC V.II 306.