Æ32 - Antoninus Pius L ΙΘ

Year 19 of Antoninus Pius's reign, which is what the regnal date ΙΘ marks, fell during one of the more administratively stable periods in Roman Egypt. Alexandria's mint tied its bronze issues to the Egyptian calendar year rather than the consular system used in Rome, a practice that makes precise dating of Alexandrian bronzes unusually straightforward compared to provincial issues elsewhere. The city's mint was effectively operating as a closed currency system — Egyptian bronzes were not legal tender outside the province, forcing travelers to exchange at the border.