Gordian III and Serapis, AE27 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, Hygieia standing right, feeding serpent in arms. E 
in left field.

Varbanov 4505 (this coin).
Note: Varbanov has this coin illustrated as no. 4504 in 
error - 4504 has no AVG in the legend.

Contributed by Zach Beasley of beastcoins.com.