Diocletian, Cyzicus mint, officina 2, 284-294 AD.,
silvered Æ Antoninianus (20-21 mm / 3,17 g), pre-reform issue,
Obv.: IMP C C VAL DIOCLETIANVS AVG , his radiate, draped and cuirassed bust right, seen from behind.
Rev.: CONCORDIA MI-LITVM / B / XXI , emperor standing r., wearing military dress and holding parazonium or short scepter, receiving small Victory on globe from Jupiter standing l. leaning on long scepter, officina numeral B in center, XXI in exergue.
RIC V, 253, 306 (common) Coh. 33 .