Gordian III and Serapis, AE26 of Odessos, Thrace.

AVT K M ANT GORDIANOC AVG, laureate draped bust of Gordian 
right, facing bust of Serapis left, wearing polos, cornucopiae
to right.
ODHCCEITWN, Nike advancing right, holding wreath and palm. E in
right field.

Varbanov 4522.