Gordian III, AE 4 Assaria of Istros, Thrace.

AVT K M ANT GORDIANOC, laureate, draped, cuirassed bust right.
ICTRIHNWN, Hygieia standing right, feeding serpent in arms,
value mark delta in left field.

AMNG -; Varbanov -; Brunsmid -; Dieudonné -; Imhoof -; etc.
Very probably unpublished.

Courtesy of romaniancoins.org, Feb. 2012
(Reference is RC for the website, year and month added)