Dupondius - Nero MAC AVG S C

Nero's bronze coinage underwent a deliberate reform around 64 AD, reducing the weight standard of the dupondius as part of a broader currency debasement tied to the costs of rebuilding Rome after the great fire. The MAC AVG attribution — referencing his role as commander — places this issue within a group produced across the later years of his reign when the mint at Rome was operating under considerable political and fiscal pressure.

Nero was the first emperor to consistently use the radiate crown to distinguish the dupondius from the as, a practical convention that persisted for two centuries afterward.