Watch List notes:

The Robert P Ball Cabinet of Ancient Coins | Lesbos, BI Stater, c. 550-450 BC, confronted calves' heads, olive branch in between, rev. rough incuse square ( Lazzarini, Contribution, Series III; SNG von Aulock 1682; SNG Ashmolean 1488-1491; BMC pp. 154, nos. 46-49; Dewing 2251; HGC 6, 1076), a lovely and well-centred example of this issue with only minimal circulation wear, good very fine, scarce.
Provenance
Bank Leu, by private treaty, 1996 - CHF1,630
Estimate: $1400 - $2000