This one is fairly rare, Magnentius is diademed, which is unusual as he is usually depicted bare- headed, but the obverse legend is really different and overly optimistic - D N MAGNENTIO PERPETVO AVG
Magnentius
A.D. 350-3
23mm 4.9gm
D N MAGNENTIO PERPETVO AVG; rosette- diademed, draped, cuirassed bust right.
FELICITAS REIPVBLICE, Emperor standing left holding Victory on globe in right hand and labarum.
In ex. PAR
RIC VIII Arles 135, Bastien 232