Æ20 - Valerian and Gallienus ΠΡΟΥϹΙΕΩΝ ΠΡΟϹ ΥΠΙΩ, (ΑΥΓΟΥϹΤΙ?)

Prusias ad Hypium — modern Konuralp in northwestern Turkey — was a minor Bithynian city that nonetheless maintained an active civic coinage through the joint reign of Valerian I and his son Gallienus, a period marked by near-continuous military crisis on multiple frontiers simultaneously. The city's coins naming both Augusti belong to the window before Valerian's catastrophic capture by Shapur I at the Battle of Edessa in 260, an event that effectively ended Roman provincial civic bronze coinage across much of the Greek East within a generation.