Diadumenian. As Caesar, A.D. 217-218. Æ as. 12.98 gm. 26 mm. Rome mint. Struck A.D. 217-218. His bareheaded, draped, and cuirassed bust right; M OPEL ANTONINVS DIAD[VMENIANVS CAES] / Diadumenian standing facing, head right, holding standard and scepter; two standards to right; PRINC IVVENTVTIS SC. RIC IV.2 212. Good Very Fine; smooth glossy dark green and red patina; minor doubling on the profile; a few small pits; evidence of careful cleaning. Very pleasing. Rare.