AR23 - Severus Alexander L ΙΑ

Year 11 of Severus Alexander's reign corresponds to a period of mounting pressure on Rome's eastern frontier, culminating in his campaigns against the Sassanid Persians under Ardashir I. The Alexandrian mint continued striking its distinctive billon tetradrachms throughout — Egypt's monetary system remained deliberately isolated from the Roman denarius, a quarantine that had persisted since Augustus and kept Alexandrian coinage non-exportable by design.

Dattari 4372 is well-documented from the early 20th-century Cairo collection that forms the backbone of Alexandrian numismatic classification. Emmett 3169.11 assigns this to the eleventh regnal year with reasonable confidence based on the L ΙΑ date formula.