Watch List notes:

Diadumenian. As Caesar, AD 217-218. AR Denarius (20mm, 3.25 g, 12h). Rome mint. 1st emission, AD 217. Bareheaded and draped bust right / Diadumenian standing left, holding baton and scepter; aquila and signum to right. RIC IV 107; Szaivert series 1-3; RSC 12. Good VF.