Watch List notes:

Diadumenian. As Caesar, A.D. 217-218. AR denarius (19.3 mm, 3.56 g, 7 h). Rome mint, struck A.D. 217. M OPEL ANT DIADVMENIAN CAES, bare-headed, draped and cuirassed bust of Diadumenian right / PRINC IVVENTVTIS, Diadumenian standing left, holding baton and scepter, two standards to his right. RIC 107; RSC 3; BMCRE 84. VF, small flan chip.

Ex Neptune Numismatics.