Gordian III and Serapis. Markianopolis AE28. 

AVT K M ANT GORDIANOC AVG, laureate, draped bust of Gordian III vis-à-vis bust of Serapis
VP MHNOFILOV MARKIANOPOLITWN, Nike standing facing, head left, holding wreath and palm, E in left field. 

Moushmov 790.

With permission of Roma Numismatics, June 2009