Dupondius - Nero SECVRITAS AVGVSTI S C II, Securitas

The SECVRITAS AVGVSTI type belongs to the coinage reform Nero pushed through in 64 AD, which reduced the weight standards of both the aureus and denarius — a debasement that funded reconstruction after the Great Fire of Rome and, almost certainly, the Domus Aurea. The dupondius at this period was distinguishable from the as primarily by its orichalcum alloy, a zinc-rich brass that gave it a distinctly yellow appearance when new.

Securitas as a personification gained particular traction under Nero precisely because his reign was shadowed by real and manufactured threats, including the Pisonian conspiracy of 65 AD.