Centenionalis - Vetranio HOC SIGNO VICTOR ERIS, Siscia

Vetranio's reign lasted roughly ten months in 350 AD, making this issue among the more historically peculiar of the late empire. He was proclaimed emperor by his own troops at Sirmium — possibly with the quiet encouragement of Constantina, daughter of Constantine I, who needed a loyalist buffer against the usurper Magnentius. Whether Vetranio was a genuine rival or a deliberate placeholder remains debated. He abdicated in December 350 after Constantius II confronted him at Naissus, reportedly talked down without bloodshed in a public address.

The Siscia mint was well within his controlled territory during his brief rule, which accounts for the relative accessibility of this type compared to the extreme rarity one might expect from so short a reign.