Constantius II, AE follis, Siscia. 24mm, 5.29 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 [SYM1]. (symbol 1 resembles an F)

RIC VIII Siscia 237 var (unlisted symbol for this series).
Rated rare.

With permission of Solidus Numismatik - Summer Auction 43, Lot 435, June 2019.