Looks like a tourist fake. Face is wrong, owl's body not right, everything about that coin looks like a modern counterfiet, sorry.
Here is what a real one looks like: Greek Attic Athens Classical Owl Tetradrachm Obverse: Head of Athena right with beaded necklace, three small upright olive leaves on front edge of Attic helmet Reverse: Owl leaning right, head facing, olive twig with two leaves and crescent moon Legend AOE (Ethnic legend) Struck c. BC 430 Weight: 17.18g From Harlan J. Berk, Chicago
