Solidus - Valentinian I VICTORIA AVGG, Treveri

Valentinian I secured his gold supply largely through control of the Rhine frontier mints, and Treveri — modern Trier — was the westernmost of his principal gold-striking facilities, positioned to pay troops defending against sustained Alamannic pressure. The years 367–375 bracket some of the most intense border warfare of his reign, including his punitive campaigns into Germanic territory following the 367 barbarian conspiracy that nearly overran Britain simultaneously with Rhine incursions.

RIC IX 17b is distinguished from the closely related 17a by its officina letter, placing it within a specific workshop sequence at Treveri that numismatists have used to reconstruct the mint's production chronology during this period.