A nice piece.
Patina, tarnish.
Obverse: bust of the emperor in laurel wreath, armor and paludamentum, to the right, in the rim legend:
M ANT GORDIANVS CAES;
Reverse: Utensils of augurs, in SC section, surrounded by legend:
PIETAS AVGG.
Bronze, diameter 30 mm, weight 18.66 g, axis 12 h.