Circulating piece of a well-liked typological issue, patina.
Obverse: emperor's head in laurel wreath, to the right, in the rim legend:
L SEPT SEV PERT AVG IMP VIII.
Reverse: emperor on horseback left, holding spear, surrounded by legend:
PROFECTIO AVG
Silver, diameter 16 x 18 mm, weight 2.61 g, axis 6 h.