Watch List notes:

Attica, Athens (454-404 BC), AR Tetradrachm, helmeted head of Athena right, with archaic features, rev. Owl, olive sprig and AOE in incuse square, 17.20g, 8h (Kroll 8; Dewing 1591-98; SNG Copenhagen 31; HGC 4, 1597), brighter silver, good very fine.
Provenance
Gorny and Mosch, Auction 233, 6 October 2015, lot 1441
Estimate: £400 - £600