Attica, Athens. Silver Tetradrachm (17.17g), ca. 440-404 BC. Head of Athena right, wearing crested Attic helmet ornamented with laurel leaves and vine. Reverse: AΘE, owl standing right, head facing, olive sprig and crescent moon behind; all within incuse square. HGC 4, 1597; SNG Cop. 31-40; Kroll 8. Boldly struck in high relief perfectly centered with a full crest and nose. Exceptionally lustrous with a light silver-gray tone. NGC graded Choice AU; Strike: 5/5, Surface: 4/5. Estimated Value $500 - UP