Gallienus Billon Antoninianus. Rome mint.

GALLIENVS AVG, radiate head right.
FIDES MILITVM, Fides standing left, holding standard 
and sceptre; N (engraved as III) in right field. 

RIC 192A, Cohen 246; Goebl 600a.

Herakles Numismatics, Inc. 2003.