Gordian III and Serapis, AE26 of Odessos, Thrace.

AVT K M ANTWNIOC GORDIANOC AG, laureate draped bust of Gordian 
right, facing bust of Serapis left, wearing polos, cornucopiae
to right.
ODHCCEITWN, Emperor standing left, foot on prow, holding Nike
and spear. E in left field.

Varbanov 4494.