Æ19 - Antoninus Pius L ΙΓ

Year 13 of Antoninus Pius's reign, which this coin dates to by its regnal dating formula, fell during one of the more administratively stable decades of the entire Principate — a fact that makes Alexandrian bronze issues from this period abundant rather than rare. The imperial mint at Alexandria functioned as Egypt's sole legal monetary authority, a monopoly enforced since Augustus converted the Ptolemaic system into a closed currency zone that barred standard Roman coinage from circulation within the province.

Egypt's closed currency system persisted into the third century, meaning these bronzes saw exclusively local use.