"Egypt, Alexandria. Gallienus. A.D. 253-268. Potin tetradrachm (22.8 mm, 10.32 g, 12 h). Dated RY 7 (A.D. 259/60). A K Π ΛI ΓAΛΛIANOC ЄY ЄYC, laureate, draped, and cuirassed bust right, seen from the front / Alexandria standing facing, head left, holding head of [Serapis] and long scepter; L Z (date) across field. Köln 2903; Dattari (Savio) 5194; Kampmann & Ganchow 90.35; Emmett 3726. Fine, green patina over red surfaces, light roughness. Rare. "