Æ36 - Valerian and Gallienus ΕΠΙ ΠΡΟΚΛΙΑΝΟΥ ΤΡΥΦΩΝΟϹ ΑΠΑΜΕΩΝ

Proklianos Tryphon, named in the magistrate formula on this issue, was one of the local officials responsible for authorizing civic bronze coinage at Apamea during the joint reign — a period when the Roman mint system was under severe pressure from the Antoninianus flood and provincial cities were left largely to their own devices for small-denomination needs. Apamea held the rank of a conventus center in Phrygia, giving it administrative weight well beyond most civic minting authorities in the region.

The double reign attribution places this coin somewhere in a fifteen-year window that saw Valerian captured by Shapur I at the Battle of Edessa in 260 — after which Gallienus ruled alone, and joint-reign civic bronzes ceased.