Continental Greece. Attica, Athens. AR Tetradrachm, c. 454-404 BC. Obv. Helmeted head of Athena right, with frontal eye. Rev. Owl standing right, head facing; olive sprig and crescent to left; all within incuse square. HGC 4 597; SNG Cop. 31; Gulbenkian 519-21. AR. 17.26 g. 26.00 mm. Great metal. Sharply struck on irregular flan, superb and lightly toned. EF.