Æ20 - Valerian and Gallienus ΑΜΙϹΟΥ ΕΛΕΥΘ

Amisus held the status of a free city — *eleuthera* — under Roman administration, a privilege that allowed it to strike its own civic bronze independently of the provincial mint system. The joint reign of Valerian and Gallienus, father and son ruling simultaneously from 253, was marked almost immediately by military catastrophe on every frontier; Valerian was captured by Shapur I at the Battle of Edessa in 260, ending the co-regency and likely terminating this issue's production at the same moment.