Watch List notes:

Moesia Inferior, Nicopolis ad Istrum. Gordian III. A.D. 238-244. Æ tetrassarion (31.6 mm, 17.90 g, 7 h). Sabinius Modestus, magistrate. A.D. 241-244. AVT K M ANT ΓOPΔIANOC AV, laureate, draped, and cuirassed bust right / YΠ CAB MOΔЄCTOY NIKOΠOΛЄITΩN ΠPOCICT PON, river god reclining left, holding reed and leaning upon jug from which the river flow. AMNG 2067; Varbanov 4462; H&J 8.36.32.1. aVF. 

Possible test strike. 

This coin is struck on a very large flan, it is possibly a test strike.