Gordian III AE27 Pentassarion of Dionysopolis. 

AVT K M ANTWNIOC (GORDIANOC AVG, laureate, draped, cuirassed 
bust right, facing bust of Serapis wearing modius.
DIONUCOPOLEITWN, Agathodaemon serpent coiled with head right; value mark E in left field. 

Varbanov 579; AMNG 402.
Note: This image was recovered after having been destroyed 
in the March 2009 website attack. The owner or seller
information was unfortunately lost. Re-added in September, 2011.