ATTICA, Athens. Circa 454-404 BC. AR Tetradrachm (21mm, 16.91 g, 6h). Helmeted head of Athena right, with frontal eye / Owl standing right, head facing; olive sprig and crescent behind; all within incuse square. Kroll 8; HGC 4, 1597. VF, lightly toned, lightly porous, banker's mark on Athena's cheek.