Gallienus Augustus 253-268AD Antoninianus RIC 18

Joint reign
19.0 x 20.3mm, 3.39g
GALLIENVS P F AVG
Radiate cuirassed bust right
(Heroic bust with draped shoulder?)
/ GERMANICVS MAX V
Trophy between two captives.
RIC V - i 18 (pg 70

Refers to the victory over the Alemanni
at Milan in 259 A.D.