Constantius II, AE3, Rome.

DN CONSTAN-TIVS PF AVG, pearl diademed, draped, cuirassed 
bust left, holding globe, N behind head.
FEL TEMP REPARATIO, Emperor nimbate and in military dress, 
with shield on left arm, on horseback galloping right, 
thrusting his spear at two barbarians wearing pointed 
Phrygian helmets, who kneel before him with their arms 
raised towards him.
Mintmark RT

RIC VIII Rome 153, rated R2.

Helios Numismatik, ebay sale, Feb. 2012.