Philip II and Serapis AE27 (5 Assaria) of Mesembria. 

M AP IOVLIOC FILIPPOC KAICAP, draped & cuirassed bust of Philip, facing draped bust of Serapis
MECAMBRIANWN, Aklepios standing front, looking left, leaning on serpent-entwined staff.

Varbanov 4277
With permission of TimeLine Auctions (www.timelineauctions.com), September, 2014