Watch List notes:

Diadumenian. As Caesar, AD 217-218. AR Denarius (20mm, 3.04 g, 12h). Rome mint. 2nd emission of Macrinus, July AD 217-March 218. Draped and cuirassed bust right / Diadumenian standing left, head right, holding standard and scepter; two standards to right. RIC IV 102 (Macrinus); Clay Issue 2; RSC 3b. VF, toned.