Gordian III and Tranquillina AE Pentassarion of Mesembria, Thrace. 

AVT K M ANT GORDIANOC AVG CEB TPANKVLLINA, laureate, draped bust of Gordian right, facing draped bust of Tranquillina left.
MECAMBRIANWN, Asklepios standing front, looking left,
leaning on serpent-entwined staff.

Moushmov 4000; Varbanov 4182. 

With exclusive permission of TimeLine Auctions (www.timelineauctions.com), Aug, 2014