Diadumenian (217-218). AE Sestertius, Rome mint. Obv. M OPEL ANTONINVS DIADVMENIANVS CAES. Bare-headed, draped, and cuirassed bust right, seen from front. Rev. PRINC IVVENTVTIS, S C in exergue. Diadumenian standing facing, head right, holding legionary aquila in right hand and cradling baton in left arm; legionary aquila and military standard in right field. RIC IV 211. 25.66 g. 32.00 mm. RR. Very rare and seldom offered. Good F.