DIOCLETIAN (284-305). Antoninianus. (23mm, 4.0 g) Siscia. Obv: IMP C C VAL DIOCLETIANVS AVG. Radiate and cuirassed bust right. Rev: CONSERVATOR AVGG / A / XXII. Diocletian standing right, holding sceptre and clasping hands with Jupiter standing left, holding sceptre; lighted altar between.