Æ15 - Tiberius L Δ

This small bronze belongs to year 4 of Tiberius's reign over Egypt, dated by the regnal year expressed in the field — the Alexandrian mint used an Egyptian dating system running from the accession of each emperor rather than Roman consular years. Egypt remained a unique administrative case under the Julio-Claudians: governed not by a senatorial proconsul but by an equestrian prefect, its coinage was kept deliberately isolated from the wider Roman monetary system and was not legal tender outside the province.