Valerian, AR antoninianus, Milan or Viminacium mint. 3.73 g. 

IMP VALERIANVS P AVG, radiate and draped bust right. 
FIDES MILITVM, Fides standing left, holding vertical standard 
and transverse standard. 

RSC 71; RIC 241; Goebl 807. 

With kind permission of Numismatica Ars Classica, Auction 59, April 2011.