A nice piece. Patina.
Obverse: bust of the empress in drapery, to the right, in the rim legend:
IVLIA-AVGVSTA;
Reverse: Kybele seated on a throne to the left, holding a branch and a horn of plenty, in the rim legend:
MATER DEVM;
Silver, diameter 18 x 19 mm, weight 2.65 g, axis 12 h.