Antoninianus - Postumus HERC PACIFERO

Postumus founded the breakaway Gallic Empire in 260 AD after capturing and likely executing Saloninus, the teenage son of Gallienus, at Cologne. He held the Rhine frontier with genuine military competence for nearly a decade, which explains why his coinage is so prolific — he ran active mints at Cologne and Trier to pay troops who had real reasons to stay loyal. He was never defeated in the field; he was murdered by his own soldiers in 269 AD after refusing to let them sack Mainz following a victory.

The billon content of his antoninianii degrades noticeably across his reign as silver supplies tightened empire-wide.