By weight, this object is identified AE4. RIC only attests to various AE3 objects of this type. If mint mark is read correctly as SMNA, then this coin was minted in Nicomedia (cf. RIC VIII Nicomedia 49, 55); other possibilities are Heraclea (SMHA)(cf. RIC VIII Heraclea 45, 54, 59) and Cyzicus (SMKA)(cf. RIC VIII Cyzicus 48, 55, 63)
Initally classified as a coin of Gordian, reverse iconography allows identification with a series of coins minted between 364-392 C.E. by the emperors Valentinian I, Valentinian II, and Valens. Condition impedes more precise identification. Cf. RIC IX Alexandria 1A, 4A; IX Antioch 10A, 35A; IX Aquileia 11A, 45A; IX Arelate 7A, 16A; IX Constantinople 16A, 41A; IX Cyzicus 8A, 12A; IX Heraclea 3A, 9A; IX Lugdunum 10A, 20A; IX Nicomedia 9A; IX Rome 15A, 23A, 55A; IX Sirmium 4A; IX Siscia 5A, 14A, 38A; IX Thessalonica 16A, 26A, 60A; IX Treveri 5A, 30A, 96A.