Watch List notes:

CORINTHIA. Corinth. Circa 550-500 BC. Obol (Silver, 8 mm, 0.37 g). Ϙ Pegasos with curved wing flying left. Rev. Quadripartite incuse square, lacking the usual swastika pattern. BCD Corinth 11 (this coin). BMC 41 and pl. I, 11. HGC 4, 1897 (this coin). A very rare variant. Toned and boldly struck. Minor deposits on the reverse. Good very fine.
From the "Collection sans Pareille" of Ancient Greek Fractions and from the BCD Collection, Lanz 105, 26 November 2001, 11, ex Burgan 18, 22 December 1984, 244.