EGYPT, Alexandria. Gallienus. AD 253-268. Potin Tetradrachm (22mm, 9.61 g, 12h). Dated RY 6 (AD 258/259). Laureate, draped, and cuirassed bust right / Eagle standing left, head right, holding wreath in beak; L ς (date) across field. Köln 2899; Dattari (Savio) 5221; K&G 90.29; Emmett 3728.6. Toned, some roughness. VF. Almost fully silvered and rare as such.