Watch List notes:

The Robert P Ball Cabinet of Ancient Coins | Sikyonia, Sikyon, AR Stater, c. 431-400 BC, Chimaera advancing left, raising forepaw, [S]E below, rev. Dove flying left, holding olive in beak, within wreath joined by rosette, 10h (BCD Peloponnesos 198.3 var.; HGC 5, 184), well-centred on an elliptical flan, some areas of striking flatness, otherwise with lovely streaks of blue tone, good fine / very fine, a very rare variety with the olive in beak.
Provenance
Bank Leu, by private treaty, 1967 - CHF440
Estimate: $500 - $800