Watch List notes:

Diadumenian. Æ Sestertius (22.68 g), as Caesar, AD 217-218. Rome, under Macrinus. M OPEL ANTONINVS DIADVMENIANVS CAES, bare-headed, draped, and cuirassed bust of Diadumenian right. Reverse: PRINC IVVENTVTIS, S C in exergue, prince standing facing, head right, holding legionary eagle and baton; behind, legionary eagle and standard. RIC 211; BMC 149. Rare. Glossy dark reddish-green patina with some smoothing noted. About Extremely Fine. Estimated Value $800 - UP
Peter Corcoran Collection, Ex Sternberg/Freeman & Sear XXVIII (30 October 1995), 194.