Watch List notes:

Diadumenian. As Caesar, AD 217-218. AR Denarius (19mm, 2.31 g, 11h). Rome mint. 2nd emission of Macrinus, AD 217-218. Bareheaded, draped, and cuirassed bust right / Diadumenian standing left, holding signum and scepter; two aquilas to right. RIC IV 102 (Macrinus); Clay Issue 2; RSC 3b. VF, darkly toned.

Ex Classical Numismatic Group Electronic Auction 189 (11 June 2008), lot 205.