Watch List notes:

Diadumenian, as Caesar, 217-218. Denarius (Silver, 20 mm, 2.33 g, 6 h), Rome. M OPEL ANT DIADVMENIAN CAES Draped bust of Diadumenian to right. Rev. PRINC IVVENTVTIS Diadumenian standing facing, head turned to right, holding standard and scepter, two standards to his right. Cohen 3. RIC 102. A sharp lustrous and clear example. Struck from a slightly worn reverse die, otherwise, about extremely fine.