Gallienus AE Sestertius, AD 256-262. Rome mint. Sole reign. 

IMP GALLIENVS AVG, laureate, draped bust right.
VIRTVS AVG, soldier standing left, holding globe and sceptre or spear. 
S-C across fields.

RIC V-I, 405; Cohen 1226; Goebl 424.

Rated as common, but apparently quite rare.
This image is taken from the Goebl catalog.