City Commemorative. Rome. AE follis. AD 337-340. 

CONSTANTINOPOLIS, laureate and helmeted bust of Constantinople left, wearing imperial mantle and necklace, and holding sceptre.
(VICTO-RIA AVG), Victory standing front, looking left, foot on prow, holding wreath and palm branch. 

Mintmark R star S. 

RIC VIII Rome 31; Gnecchi 2a in RIN 1891.

_rome_RIC_VIII_O31_S