Watch List notes:

The Robert P Ball Cabinet of Ancient Coins | Attica, Aegina, 'Land Tortoise' AR Stater, c. 456/445-431 BC, Tortoise with segmented shell, rev. quadripartite incuse square with skew pattern, 12.39g (Meadows [Aegina], Group IIIb; Milbank, Pl. II, 13; SNG Copenhagen 517; HGC 6, 437), some faint metal stressing to peripheries, otherwise attractively struck in high relief with a hint of residual toning, a pleasingly bold very fine, scarce in this impressive state.
Provenance
Bank Leu, by private treaty, 1968 - CHF1,600
Estimate: $1400 - $2000