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Diadumenian as Caesar (217-218). AE Sestertius. Obv. M OPEL ANTONINVS DIADVMENIANVS CAES. Bare-headed, draped, and cuirassed bust right, seen from front. Rev. [PR]INC 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; C. 7. 26.19 g. 32.50 mm. RR. Gently cleaned. Very rare and choice example. Nice dark patina with green hues. Good VF/VF.