Rare follis, R2 in the Roman Imperial Coinage catalogue.
Roman Imperial
Constantius II as caesar (324-337), Follis 335-336, Siscia mint
Obverse: laureate, cuirassed bust right
FL IVL CONSTANTIVS NOB C
Reverse: two soldiers standing front, heads turned inward, each holding spear and shield, one standard, o on banner between them, in exerque ΓSIS
GLORIA EXERCITVS
Diameter 16 mm, weight 1.61 g