AR23 - Antoninus Pius L Ζ

Year seven of Antoninus Pius's reign fell during a period of unusual stability in Roman Egypt — no revolt, no flood crisis, no currency reform. The billon tetradrachm continued as Alexandria's workhorse denomination, its silver content already debased well below early imperial standards by this point, a slow degradation that had been underway since Nero's currency manipulations in the 60s AD. The Alexandrian mint operated under tight imperial oversight, with types changed annually in ways that allow precise regnal-year attribution rare in provincial coinage.