Quintillus, AE antoninianus, Milan mint. 

IMP QVINTILLVS AVG, radiate, draped bust right
FIDES MILIT, Fides standing left, holding two standinards.

Officina letter S in exergue. 

RIC V-1 Milan 52


With kind permission of Numismatik Lanz, Auction 2000
Sold for 240 Euros.