Gordian III and Tranquillina, 238-244 AD, AE28 of Tomis, Thrace. 

AVT K M ANT GORDIANOC AVG CE TRANKYLLEINA, laureate, draped, 
cuirassed bust of Gordian right facing draped bust of 
Tranquillina left.
MHTRO PONTOY TOMEWC, Hera standing left, holding patera and 
sceptre, Delta over < in right field. 

Varbanov 5691 var (value mark in left field): AMNG 3517-3518 var (ditto)