Watch List notes:

Attica. Athens. c. 500-480 BC. Tetradrachm, 16.47g (11h). Obv: Helmeted head of Athena right. Rx: ΑΘΕ Owl standing right, head facing; in upper left field, olive spray; all within incuse square. Cf. Seltman, pl. XVI (group M). EF for issue