A very nice piece.
Obverse: bust of the emperor in laurel wreath, armor and paludamentum, to the right, in the rim legend:
IMP GORDIANVS PIVS FEL AVG;
Reverse: Salus standing right, feeds snake from patera, surrounded by legend:
SALVS AVGVSTI;
Silver, diameter 20.5 mm, weight 3.43 g, axis 12 h.