Watch List notes:

Diadumenian, as Caesar, 217-218. Denarius (Silver, 19mm, 3.28 g 6), Rome. M OPEL ANT DIADVMENIAN CAES Bareheaded and draped bust of Diadumenian to right. Rev. PRINC IVVENTVTIS Diadumenian as Princeps Iuventutis standing facing, his head turned to right, holding baton in his right hand and scepter in his left; on right, two standards surmounted by eagle and wreath. Cohen 14. RIC 108. Appealing portrait. Fine style. Good very fine.