Watch List notes:

Diadumenian, as Caesar, 217-218. Denarius (Silver, 20 mm, 3.26 g, 12 h), Rome, late July 217 - end February 218. M OPEL ANT DIADVMENIAN CAES Bare-headed, draped and cuirassed bust of Diadumenian to right, seen from behind. Rev. PRINC IVVENTVTIS Diadumenian standing front, his head turned to right, holding standard with his right hand and scepter in his left; to right, two standards. BMC 87. Cohen 3. RIC 102. Very fine.
From the DA Collection, USA.