Nummus - Constantius II VOT XX MVLT XXX, Nicomedia

The VOT XX MVLT XXX legend places this issue precisely within the *decennalia* vow cycle — Constantius II had completed twenty years of rule (counting from his elevation as Caesar in 324) and was formally vowing the next decade. These vow coinages were struck simultaneously across multiple eastern mints in 347–348 as part of a coordinated empire-wide issue, one of the last moments of genuine administrative unity before the sons of Constantine began tearing the empire apart. Nicomedia was then still a functioning imperial capital, Diocletian's old seat.