Watch List notes:

Diadumenian, as Caesar (Macrinus, 217-218), Sestertius, Rome, AD 217-218; ; M OPEL ANTONINVS DIA[DVMENIANVS CAES], bust draped and cuirassed, Rv. PRINC [IVVE]N[TVTIS], Diadumenian standing l., head r., holding sceptre and standard; on r., two standards; in ex. S C. RIC 211; C 7.
Very rare. Dark green patina, flan crack, good very fine.