Circulating piece, patina.
Obverse: emperor's head in laurel wreath, to the right, in the rim legend:
L SEPT SEV PERT AVG IMP VIIII;
Reverse: genius standing left, holding patera over altar, surrounded by legend:
[]OS II PP
Silver, diameter 16 x 17.5 mm, weight 3.7 g, axis 6 h.