Diadumenian as Caesar. AE 16; Diadumenian as Caesar; 217-218 AD, Marcianopolis, Moesia Inferior, AE 16, 3.05g. AMNG-799 var. Obv: M OΠEΛΛIOC ANTΩNEINOC (NE ligate) Bare-headed, cuirassed bust r. Rx: MAPKIAN - OΠOΛEITΩN (ΩN ligate) Tyche standing l. holding rudder and cornucopia.. aEF