Antoninianus - Tetricus I SPES PVBLICA

Tetricus I ruled the Gallic Empire under constant military pressure, and by 272–273 his authority was visibly crumbling — Tetricus II had been elevated as co-emperor largely to project dynastic stability that didn't exist. The SPES PVBLICA reverse type, invoking public hope, appeared with almost cynical frequency in this terminal phase of the breakaway empire. Within months of this issue, Tetricus surrendered to Aurelian at the Battle of Châlons, reportedly having sent secret overtures to Aurelian beforehand, effectively negotiating his own defeat.

Billon content in late Gallic Empire antoninianii had degraded severely by this point, often approaching silver levels indistinguishable from base metal washes.