Diadumenian AD as Caesar 217-218. Denarius (AR; 19-20mm; 2.g; 5h) 217-218. M OPEL ANT DIADVMENIAN CAES Draped bust of Diadumenian, head bare, to right. Rev. PRINC IVVENTVTIS Diadumenian, in military dress, standing front, head right, holding standard and sceptre; to right two standards.
BMCRE V p. 509, 84 and pl. 80.16; C. 3; RIC IV, 2 p. 13, 102 and pl. 1.19.