Æ19 - Antoninus Pius L ΙΘ

Year 19 of Antoninus Pius corresponds to 155–156 AD, a period of administrative quiet in Egypt — no revolt, no flood crisis, no documented disruption to the Alexandria mint. The city's bronze coinage was tied to the regnal year system imposed under Roman rule, with the dating formula serving fiscal and administrative functions rather than commemorative ones. Alexandria operated as a closed monetary system; provincials could not legally import or export Roman imperial coinage, so this piece circulated entirely within Egypt's borders.