Diadumenian, AE 27 of Nikopolis ad Istrum. Marcus Claudius Agrippa, legate.

K M OPPEL ANTWNI DIADOYMENIANOC, bare-head right.
UP AGRIPPA NIKOPOLITWN PROC ICT, serpent-entwined tripod 
altar.

Varbanov 3648 (this coin).
With kind permission of Numismatik Lanz, Auction 2003.