Coin is not listed in Roman Imperial Coinage catalogue.
Roman Imperial
Decentius (350–353), Maiorina 351-353, Aquileia mint
Obverse: bare-headed and cuirassed bust right, A behind bust
D N DECENTIVS FORT CAESAR
Reverse: two Victories facing one another holding between them wreath inscribed VOT / V / MVL / X, AC below, AQS in exergue
VICTORIAE DD NN AVG ET CAES
Diameter 22 mm, weight 5.85 g