Watch List notes:

Diadumenian. As Caesar, AD 217-218. Æ As (24.5mm, 11.60 g, 12h). Rome mint. 2nd emission of Macrinus, AD 217-218. Bareheaded, draped, and cuirassed bust right / Diadumenian standing right, holding signum and scepter; signum and aquila to right. RIC IV 212; Clay Issue 2. Fine, brown, slightly granular surfaces, traces of deposits.