Attica, Athens AR Tetradrachm Silver, 16.85, 24mm) ca 454-404 BC.
Obv: Head of Athena right, in crested Attic helmet ornamented with three olive leaves above visor and spiral palmette on bowl, wearing round earring with central boss
Rev: Owl standing to right with head facing, olive sprig and crescent behind, ΑΘΕ before; all within incuse square.
Ref: Kroll 8; Dewing 1591-8; SNG Copenhagen 31.