AR27 - Domitian ΕΤΟΥΣ ΔΕΥΤΕΡΟΥ

This tetradrachm belongs to Domitian's second regnal year as reckoned by the Alexandrian calendar — a dating system running from late August, meaning the coin falls in the Roman year 82–83 AD. The Alexandria mint operated under tight imperial oversight, producing billon tetradrachms as the dominant fiduciary currency of Roman Egypt, a closed monetary zone where outside silver coinage was officially exchanged and reminted upon entry. Domitian's Egyptian issues are relatively plentiful, but the progressive debasement of the billon fabric across his reign means alloy composition varies meaningfully even within a single year's output.