A nice piece. Patina.
Obverse: head of the Emperor wearing a laurel wreath to the right, surrounded by the legend:
IMP CAESAR VESPASIANVS AVG
Reverse: Paxseated on throne to left, holding olive branch and caduceus, in the rim legend:
COSITER TR POT;
Silver, diameter 17.5 x 19 mm, weight 3.12 g, axis 6 h.