Solidus - Valentinianus I RESTITVTOR REIPVBLICAE, Constantinopolis

Valentinian I came to power in February 364 through military election at Nicaea, and within hours of his acclamation he appointed his brother Valens co-emperor — one of the few uncontested dynastic decisions of the late Roman period. The Constantinopolis mint was producing solidi to both emperors simultaneously from that point forward, which makes attribution of individual pieces to one reign or the other dependent almost entirely on the reverse type and officina letter.

RIC IX 3b is the officina-specific classification within a tightly grouped series; the officina mark remains the critical detail for confirming the precise variety against OCRE documentation.