Watch List notes:

IONIA. Uncertain. Circa 550-500 BC. Obol (Silver, 8 mm, 0.95 g). Head of a calf to left. Rev. Quadripartite incuse square. CNG E-Auction 303 (2013), 46 and Naumann 12 (2014), 257, otherwise unpublished. Extremely rare, apparently the third and best known example. Extremely fine.