Philip II and Serapis, AE24 of Mesembria, Thrace. 

Obv: MAR IOVLIOC FILIPPOC KAICAP, bare head of Philip II 
right vis-a-vis draped bust of Serapis left.
Rev: MECAMBRIANWN, Athena, helmeted, standing left, 
holding owl and and inverted spear, shield at foot.

Varbanov 4281; Moushmov 4033

Courtesy of Münzen Ritter, March 2011