Gordian III, AE28 of Istros, Moesia. 

AYT K M ANTW GORDIANOC, laureate, draped and cuirassed bust right.
ICTRIHNWN around, ICTROC below, river-god Istros reclining left, holding reed and resting left arm on urn from which water flows.

Value mark E in left field.

Varbanov 680; RPC VII, 1814; Paris F9155; Berlin 18278138; Soutzu Tomis (1900), fig. 10; Dima Istros 67.

Sold by Creusy Numismatique, Geneva, auction 7, lot 659, on Numisbids.com, May 2014.