Æ33 - Antoninus Pius L ΔΕΚΑΤΟΥ

Year 10 of Antoninus Pius in Alexandria corresponds to 146–147 AD, the regnal year recorded by the L ΔΕΚΑΤΟΥ legend — the Greek abbreviation for "year ten." Alexandrian civic bronzes were dated by regnal year rather than consular year, a distinctly Egyptian administrative habit inherited from Ptolemaic practice and maintained stubbornly under Roman rule even as the rest of the empire used different dating conventions.

The IV.4#988 reference places this within Dattari-Savio's exhaustive corpus of Alexandrian coinage, the standard reference for the series.