ATTICA, Athens. 454-404 BC. AR tetradrachm (17,11 g). Head of Athena in Attic helmet to right / AΘE, Owl standing right, head facing; Olive spray and crescent to left. All within incuse square. Early classical issue. Very light korrosion on obverse and small deposits of horn silver. Light iridescent toning., Kroll 8, SNG Cop. 31-40, HGC 4, 1597, Grade: 1+, Purchased from London Ancient Coins