Diadumenian, AE27 of Nikopolis ad Istrum, Moesia. Magistrate Agrippa. 

K M OPPEL ANTWNI DIADOYMENIANOC, bare head right.
YP AGRIPPA NIKOPOLITWN PROC ICTR, Tyche seated left, holding patera and sceptre.

AMNG 1795; Megaw NIC4.11.
 Very rare.

With permission of cngcoins.com, the AK collection sale.