Watch List notes:

Diadumenian. As Caesar, AD 217-218. Æ As (23mm, 9.73 g, 11h). Rome mint. 1st emission of Macrinus, AD 217. Barehead and draped bust right / Diadumenian standing left, holding baton; two signa to right. Cf. RIC IV 216-217; Clay Issue 1. Red-brown patina, smoothing. Good Fine.