Æ34 - Antoninus Pius L ΙΕ

Year 15 of Antoninus Pius's reign, which this coin's regnal date records, fell during one of the more administratively stable decades Roman Egypt would see. Alexandria's mint calibrated its output by regnal year with unusual consistency, and the L ΙΕ (year 15) dating places this piece within a period of relatively high bronze production — Antoninus kept grain shipments to Rome a fiscal priority, and a functioning Egyptian coinage supported the local tax-collection apparatus that made those shipments possible.

The 34mm module is on the larger end of Alexandrian bronze issues, typically associated with diobol or obol fractions depending on the specific emission within Emmett's classification framework.