Diadumenian. As Caesar, AD 217-218. AR Denarius (20mm, 3.33 g, 6h). Rome mint. 2nd emission of Macrinus, AD 217-218. Bareheaded, draped, and cuirassed bust right / Diadumenian standing left, holding signum and scepter; two signa to right. RIC IV 105 (Macrinus); Clay Issue 2; RSC 6a. Toned, minor deposits, struck with a worn reverse die. Good VF.