Watch List notes:

ATTICA, Athens. Circa 454-404 BC. AR Tetradrachm (22mm, 17.16 g, 8h). Helmeted head of Athena right, with frontal eye / Owl standing right, head facing, closed tail feathers; olive sprig and crescent to left; all within incuse square. Starr pl. XXIII, 10'; Kroll 8; HGC 4, 1597. Toned. Good VF.

The style of this piece suggests that it was struck very early in the long classical period production that lasted from circa 454-404 BC.