Gallienus, AR Antoninianus, 256-257, Joint Reign, Lugdunum (RIC) Cologne
GALLIENVS . P . F . AVG
Radiate, cuirassed bust left, spear in right hand over shoulder, shield engraved
with head of Medusa in left
GERMANICVS MAX V
Trophy between two bound seated captives
19mm x 24mm, 2.92g