Gallienus, AV aureus, Siscia. 19mm, 4,56 g. Sole reign. AD 266. 

GALLIENVS AVG, head left, wreathed with corn.
FIDES MIL, Fides standing front, looking right, holding
standard in each hand.

RIC 38; Cohen 226; Goebl 1435b. 

With permission of Münzen & Medaillen AG Basel, Auction 93, Lot 253, Dec. 2003.

Very rare.