Attica, Athens. Silver Tetradrachm (17.18 g), ca. 454-404 BC Helmeted head of Athena right, frontal eye. Reverse: ΑΘΕ, 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. NGC grade MS; Strike: 5/5, Surface: 4/5. Ex Parliament Collection