Magnentius. 4.36g; 23mm. 350-353 AD. Arles. 

DN MAGNEN-TIVS PF AVG, bare-headed, draped, cuirassed 
bust right, A behind bust

GLORIA ROMANORVM, Emperor, bare-headed, on horseback right, 
no shield, spearing enemy on ground in front of horse, 
broken spear and shield beneath horse. 

Star in upper right field. 

Mintmark SAR. 

RIC VIII Arles 150 var (RIC does not list the star in the field)

With permission of Roma Numismatics, December, 2009