Watch List notes:

ATTICA. Athens. Circa 393-355 BC. Tetradrachm (Silver, 21 mm, 17.26 g, 9 h). Head of Athena to right, with profile eye, wearing crested Attic helmet with palmette and three olive leaves. Rev. AΘΕ Owl standing right, head facing; behind, olive spray and crescent moon. HGC 4, 1598. Kroll 15. SNG Copenhagen 63. Toned. Two large bankers' marks on the obverse, otherwise, about extremely fine.

From an old Swiss collection, formed circa 1950s to 1970s.