A nice piece. Patina.
Obverse: bust of the emperor with uncovered head, wearing armor and paludamentum, to the right, in the rim legend:
P SEPTIMIVS GETA CAES;
Reverse: Minerva standing left, holding spear and shield, surrounded by legend:
MINERV SANCT
Silver, diameter 18 x 19 mm, weight 3.06 g, axis 6 h.