Diadumenian. As Caesar, AD 217-218. AR Denarius (20mm, 2.47 g, 6h). Rome mint. 1st emission of Macrinus, AD 217. Bareheaded, draped, and cuirassed bust right / Diadumenian standing left, holding baton and scepter; aquila and signum to right. RIC IV 108 (Macrinus); Clay Issue 1; RSC 14a. Good VF. Struck on a broad flan.