Gordian III and Serapis, AE30 Pentassarion, Markianopolis. 

Obv: AVT K M ANTWNIOC GORDIANOC, laureate, draped bust of 
Gordian right, facing draped bust of Serapis left
Rev: YP MHNOFILOY MAPKIANOPOLITON, Nemesis-Aequitas standing 
left, holding scales and short sceptre or rod, wheel at 
foot. 

Retrograde E in right field. 

cf Moushmov 809; and Varbanov 2006. (legends somewhat 
barbaric: obv. and rev. legend combination otherwise 
non-existent, E retrograde).

With permission of Roma Numismatics, Jun, 2010