AR24 - Antoninus Pius L ΤΡΙΤΟΥ

The regnal year L ΤΡΙΤΟΥ — year three of Antoninus Pius — dates this tetradrachm to 139–140 AD, the period immediately following Hadrian's death and Antoninus's accession. Alexandria's imperial mint operated under Roman authority but retained its own dating system, local fabric, and billon alloy, a deliberate administrative holdover that Rome found more practical to preserve than dismantle. The early years of Antoninus's reign saw the Alexandrian mint produce an unusually broad range of reverse types, likely reflecting a new administration establishing its iconographic priorities.

Milne 1627 places this squarely in a well-documented sequence, with Dattari-Savio 2924 confirming the type's relative accessibility among third-year issues.