Æ21 - Valerian and Gallienus COL AV TRO

Alexandria Troas held colonial status under Rome from the time of Augustus, and by the joint reign of Valerian and Gallienus it was one of the few cities in the eastern provinces still producing a substantial local bronze coinage. The mint's output under this co-regency is reasonably well documented, but attribution between the two emperors — and to the joint reign itself — remains contested in the literature, with von Aulock and later SNG compilations sometimes assigning the same die pairings differently.

Valerian's capture by Shapur I at the Battle of Edessa in 260 effectively ended the joint reign and terminated the colonial mint's activity shortly after.