Sestertius - Philippus I P M S COL VIM, Viminacium

Viminacium, the legionary fortress city on the Danube that served as headquarters of Legio VII Claudia, was granted colonial status by Philippus I — almost certainly as a political reward tied to his own origins in the region. The city began striking its own bronze coinage in 239 AD under Gordian III, inaugurating a local era whose year-date appears on every coin of the series, making Viminacium bronzes among the most precisely datable provincial issues in the entire Roman east.

The multiple RPC references reflect genuine die and type variation across the five-year reign, not merely cataloguing overlap.