Watch List notes:

CARIA. Chersonesos. Circa 480-450 BC. Obol (Silver, 9.5 mm, 0.91 g, 12 h). Head of a roaring lion to right with right paw extended. Rev. Forepart of a bull to right; all within an incuse square. Cahn X26. HN Online 565. SNG Keckman 33-34. Very rare. Attractively toned and well-struck. Minor fault on the reverse, otherwise, about extremely fine.
From the "Collection sans Pareille" of Ancient Greek Fractions, and from the collection of H. von Aulock, but not in the sylloge.