Diadumenian AE16 of Nikopolis ad Istrum, Moesia. AD 218.

K M OPEL DIADOYMENIANOC, bare-headed, draped bust right.
NIKOPOLITWN PROC IC, serpent-entwined staff of Asklepios.

AMNG 1882; Megaw NIC1.2a.

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