Watch List notes:

LESBOS, Unattributed Koinon mint. Circa 510-480 BC. BI Stater (20mm, 11.10 g). Confronted calves' heads; olive tree between / Small incuse square punch. Lazzarini, Contribution, Series III; HGC 6, 1076. Deeply toned. In NGC encapsulation 5872733-092, graded Ch VF, Strike: 4/5, Surface: 4/5.

From the Robert W. Bartlett Bequest Sold for the Benefit of the American Numismatic Society. Ex Birkler & Waddell 4 (9 December 1982), lot 95.