Watch List notes:

ANCIENT COINS. GREEK COINS. Macedon, Olynthos, Chalkidian League (c.432-348 B.C.), Silver Tetradrachm, 14.47g, 1h. Head of Apollo facing right, wearing a laurel-wreath. Rev. X-A-Λ-KIΔ-EΩN, kithara, EΠI APIΣTΩNOΣ below (Robinson & Clement, Excavations at Olynthos, IX, 131; SNG ANS 497 (this reverse die); Dewing 1071).Well-centred on a full flan, beautiful style, lightly toned, extremely fine.
Purchased from Bank Leu AG, Zürich, 6 January 1990
Ex Prospero Collection, The New York Sale XXVII, 4 January 2012, lot 286

Estimate: US$ 19,500