Attica, Athens. AR Tetradrachm, ca. 454-404 BC. 17.21 gms. Helmeted head of Athena right, rev. Owl standing right, head facing, closed tail feathers, olive sprig and crescent behind; all in an incuse square. Kroll 8, SNG Copenhagen 31. NGC AU, Strike: 5/5; Surface: 4/5.