Very rare reverse type struck only at Siscia mint.
Obverse: IMP PROBVS P F AVG
Radiate, cuirassed and draped bust right, seen from back
Reverse: FELICITAS SAECVLI / XXIS
Felicitas standing left, holding patera over altar and caduceus.
Bilon, diameter 21 mm, weight 4,43 g.
