Diadumenian, as Caesar, 217-218. As (Copper, 24 mm, 10.00 g, 12 h), Rome, summer 217-early 218. M OPEL ANTONINVS DIADVMENIANVS CAES Bare-headed and draped bust of Diadumenian to right. Rev. PRINC IVVENTVTIS / S - C Diadumenian standing front in military attire, head to right, holding aquila in his right hand and scepter in his left; to right, two signa. BMC 159. Clay issue 2. Cohen 9. RIC 212. Rare and with an excellent pedigree. Minor smoothing and the reverse a bit weak, otherwise, good very fine.