Magnentius AE3 "Centenionalis" 5.35g; 23mm. Arles. 350-353 AD.  

Obv: D N MAGNENTIVS P F AVG, pearl-diademed, draped and cuirassed bust right.
Rev: FELICITAS REIPVBLICE, emperor in military dress 
standing left, holding Victory on globe and standard.

F in left field.
Mintmark PAR.

RIC VIII 138; cf Sear 4019. Rare.

Courtesy of Roma Numismatics, Feb, 2010