AR24 - Antoninus Pius L ΚΓ

Year 23 of Antoninus Pius's reign falls squarely within the longest peaceful principate of the entire imperial period — no major wars, no succession crises, no currency collapses. Alexandria's billon tetradrachms of this era reflect that stability in their relatively consistent alloy, though the silver content had been quietly declining for decades by this point, a slide that would accelerate catastrophically under later emperors. Emmett 1428.23 is well-attested across the major collections, Dattari's Cairo Museum specimens among the primary reference points for the type.