Attica. Athens. Silver Tetradrachm (16.23g), ca. 440-404 BC. Head of Athena right, wearing crested Attic helmet onamented with thee olive leaves above visor and spiral palmette on helmet; round earring and pearl necklace. Reverse: AΘE before owl standing to right with head facing, olive spring and crescent behind; all in incuse square. Kroll 8; Dewing 1591-8; SNG Coppenhagen 31. Well centered and lightly toned. NGC graded Ch XF; Strike 5/5, Surface 4/5. Estimated Value $500 - UP