Watch List notes:

Diadumenian. As Caesar, AD 217-218. AR Denarius (20mm, 2.87 g, 6h). Rome mint. Struck AD 217-218. Bareheaded, draped, and cuirassed bust right / Diadumenian standing slightly left, head right, holding signum and scepter; two signa to right. RIC IV 102; RSC 3b. Good VF, toned, slightly granular surfaces.