Egypt. Alexandria. Gallienus, 253-268. Tetradrachm (Billon, 21.9 mm, 9.52 g). Dated RY 15 (= 267/8). AVT K Π ΛIK ΓAΛΛIHNOC CЄB Laureate and cuirassed bust right. Rev. Poseidon standing left, right foot on dolphin, holding palm frond and trident; ЄI/L (date) to lower left, palm frond to right. Geissen 2953. Dattari-Savio 5259. Emmett 3827. Cf. Astarte V, 28.10.1999, lot 1177. Good Very Fine. Very rare. Ex Empire Coins 8, 7 December 1987, lot 750. Rare tetradrachm of excellent preservation dating back to the last year of Gallienus’ ruling. On the reverse the naked figure, athletic and quick of Poseidon, god of the sea, with palm branch and trident resting his right leg on the tail of a dolphin, headlong.