Constantius II, AE follis, Siscia. 19mm, 2.48 g. AD 367-375. 

DN CONSTAN-TIVS PF AVG, pearl-diademed, draped, cuirassed bust right. 
FEL TEMP-REPARATIO, Emperor in military dress standing on galley moving left, holding Phoenix and labarum. Victory sitting at the stern, steering the ship.

Mintmark Epsilon SIS [SYM6]. (symbol 6 resembles a hook)

RIC VIII Siscia 237.
Rated common.

With permission of Numismatik Naumann auction 72, lot 703.