Diadumenian. AE Sestertius, AD 217-218. 23.14 g.

M OPEL ANTONINVS DIADVMENIANVS COS CAES, bare-headed, draped and cuirassed bust right.
PRINC IVVENTVTIS, Diadumenian standing front, looking right, holding standard and sceptre, on right two standards. S-C below. 

RIC 211; BMCRE 149; Cohen 7.
Rare. 

With permission of Numismatica Ars Classica auction 100, Lot 1947, May 2017.

Ex Sir H. Weber Collection (Hirsch auction 30, lot 1107 in 
1911; ex Baron Friedrich von Schennis coll. (Hirsch auction 33, lot 1372 in 1913; ex Glendining & Co. 2 April 1952, lot 2689; ex Swiss Bank Corp. auction 28, lot 645 in 1991.