Gallienus, AE antoninianus, Antioch.

GALLIENVS AVG, radiate, draped bust left.
VIRTVS AVG, Hercules standing right, right hand behind his 
back, lionskin over left arm and resting on club.

Mintmark SPQR

RIC V-1 (S), Asian Mint 671; Moushmov Serdica 558

Moushmov plate coin, sorry about the quality.