AR24 - Severus Alexander L ΙΑ

Alexandria's billon tetradrachms of Severus Alexander's reign were struck under the distinctive Egyptian regnal year system, this piece dated to year 11 (ΙΑ), corresponding to 231–232 AD — the period when Alexander was preparing his Persian campaign against the resurgent Sassanid dynasty under Ardashir I. The Egyptian mint operated with considerable autonomy from Rome, maintaining its own fabric, iconography, and dating conventions well into the third century.

Dattari 4278 is among the better-documented die references for this regnal year, catalogued from the enormous Dattari collection assembled in Alexandria around the turn of the twentieth century — still the foundational reference for this series.