Constantius II, AE4, Rome.

DN CONSTAN-TIVS PF AVG, pearl diademed, draped, cuirassed bust right.
FEL TEMP RE-PARATIO, soldier standing left, spearing
fallen horseman who is wearing a Phrygian helmet, clutching
horse's neck.
S in right field.
Mintmark RP.
RIC VIII Rome 266, rated common.

from Dane's collection, March 2011.