Watch List notes:

SYRIA, Seleucis and Pieria. Antioch. Macrinus, with Diadumenian as Caesar. AD 217-218. Æ (20mm, 5.52 g, 12h). Laureate and cuirassed bust of Macrinus right / Bareheaded, draped, and cuirassed bust of Diadumenian right; S C across field. McAlee 738/2 (this coin illustrated). Good VF, attractive black patina under light earthen encrustation. Very rare.

From the Dr. George Spradling Collection. Ex Classical Numismatic Group Electronic Auction 168 (11 July 2007), lot 169.