Attica, Athens. Silver Tetradrachm (17.2 g), ca. 460-404 BC. Helmeted head of Athena right, frontal eye. Reverse: AΘE, owl standing right, head facing; above to left, olive-spray with berry and crescent; all within incuse square. Kroll 8; Svoronos pl. 14; SNG Copenhagen 31-40. Excellent metal. Mint State. Estimated Value $3,000 - 4,000