Watch List notes:

Diadumenian, as Caesar, Denarius struck under Macrinus, Rome, ca. AD 217-218; AR (g 3,26; mm 20; h 6); M OPEL ANT DIADVMENIAN CAES, draped bust r., Rv. PRINC IVVENTVTIS, Diadumenian standing l., head r., holding sceptre and standard; on r., two standards. RIC 102; C 3.
Scarce. Lightly toned, nice portrait, good extremely fine.