Æ24 - Valerian and Gallienus ΕΠΙ Ϲ ΒΑΛ ΑΡΙϹΤΟΜΑΧ/ΟΥ ΜΥ-ΤΙΛΗ/ΝΑΙΩΝ

Mytilene, the principal city of Lesbos, retained the right to issue civic bronze under the joint reign largely because such coinage served local exchange needs the imperial mint at Cyzicus had little interest in meeting. The magistrate name preserved in the legend — Valerius Aristomachos — anchors this piece to a specific administrative moment in the city's Roman-period history, though his precise term cannot be dated within the reign.

Civic issues from the Pergamene conventus during the 250s and 260s were increasingly disrupted by Gothic raiding along Aegean coasts, making uninterrupted local minting across this entire fifteen-year span unlikely.