Watch List notes:

Diadumenian. As Caesar, AD 217-218. AR Denarius (20mm, 3.63 g, 12h). Rome mint. 2nd emission of Macrinus, AD 217-218. Bareheaded and draped bust right / Diadumenian, in military dress, standing facing, head right, holding aquila in right hand and scepter in left; two signa to right. RIC IV 102 var. (bust also cuirassed); Szaivert 9-10; RSC 3a. EF, deeply toned with iridescence on reverse, slightly clashed reverse die. Scarce with bust seen from behind.

From the Dr. Allan Smith Collection.