RIC does not list a PAR•L ; but it does have PAR•F (Arles 146). Ferrando does have the •L catalogued as # 1127.
Constantius II
A.D. 350
22mm 4.8gm
D N CONSTAN-TIVS P F AVG; pearl diademed, draped & cuirassed bust right, A behind bust.
FEL TEMP REPARATIO; Soldier spearing fallen horseman, A in left field.
In ex. PAR•L
RIC VIII Arles -- ; Ferrando 1127