A nice piece of a rare and sought-after issue. Patina, tarnish.
Obverse: emperor's head in laurel wreath, clockwise, in the rim legend:
IMP CAE L SEP SEV PERT AVG
Reverse: legion insignia, in section legend TR P COS, in rim legend:
LEG V MAC
Silver, diameter 16.5 mm, weight 2.46 g, axis 2 h.