As Diadumenianus

DIADUMENIANUS (under MACRINUS). Æ As. Rome, July 217-March 218 AD Obv. M OPEL DIADVMENIANVS CAES Bare-headed, draped, and cuirassed bust right Rev. PRINC IVENTVTIS SC Diadumenian standing, head right, holding standard and scepter; two standards to his right. Cohen 9 (20 F) Rare. London coin fair, ex. Beirne, 6 Nov. 1999