Attica, Athens. Ca. 454-404 B.C. AR tetradrachm (23 mm, 16.87 g, 8 h). Helmeted head of Athena right, with frontal eye / ΑΘΕ, owl standing right, head facing; above and behind, olive sprig and crescent; all within incuse square. Kroll 8; SNG Copenhagen 31. Light iridescent toning, some light granularity on the reverse. Extremely fine.