Diadumenian, AR denarius. AD 217-218. 18.5mm, 3.11 g. Rome mint. 

M OPEL ANT DIADVMENIAN CAES, bareheaded, draped, and cuirassed bust right.
PRINC IVVENTVTIS, Diadumenian standing left, looking left, holding standard and sceptre, two more standards to right. 

RIC IV 105; RSC 6a. 

With permission of cngcoins.com, auction 441, Lot 457, April 2019