Æ23 - Antoninus Pius L ΙΖ

Year 17 of Antoninus Pius's reign — the L ΙΖ in the dating formula — places this issue squarely in the middle of one of the most administratively stable periods Roman Egypt ever experienced. The Alexandria mint was producing bronze at high volume during these years, feeding a provincial economy that ran almost entirely on its own closed currency system: Roman silver was not legal tender in Egypt, forcing every trader, soldier, and taxpayer to exchange at the border.

Dattari-Savio IV.4 #1618 is among the more frequently cross-referenced Alexandrian types, though die matches across collections remain inconsistently documented.