ATTICA, Athens. 454-404 BC. AR tetradrachm (17,16 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. Obverse struck a little off-center. Lightly toned and attractive., Kroll 8, SNG Cop. 31-40, HGC 4, 1597, Grade: 01