Diadumenian, AV quinarius. Rome. AD 217-218. 15 mm, 3.62 g.

M OPEL ANT DIADVMENIAN CAES, bare-headed, draped bust right.
PRINC IVVENTVTIS, Diadumenian, standing front, looking right, holding standard and sceptre.

RIC 110; Cohen 16.
Image courtesy of the Münzkabinett Wien, inv. no. 68037.