Diocletian. Cyzicus mint, struck AD 290. Silvered BI Antoninianus (21 mm, 3.59 g)

Obv:IMP C C VAL DIOCLETIANVS P F AVG, radiate and cuirassed bust right.

Rev: CONCORDIA MILITVM, emperor standing right, receiving Victory on globe from Jupiter standing left and leaning on sceptre; KΓ between.

RIC VI-15a.