Diocletian, Siscia, AE Antoninianus. AE23. 289-290 AD. IMP C C VAL DIOCLETIANVS P F AVG, radiate and cuirassed bust right. CONSERVATOR AVGG, Diocletian and Jupiter, each holding a sceptre, standing facing each other by an altar. Mintmark dot XXI dot A dot RIC 263: Sear 12640. With permission of Auktionshaus H. D. Rauch GmbH, Sept 2013.