Watch List notes:

BITHYNIA. Tios. Circa 400 BC. Obol (Silver, 10 mm, 0.68 g, 12 h). Bearded male head to right, wearing a tainia. Rev. Τ-Ι-Η Eagle to right, with spread wings, holding a snake in its talons. Unpublished, save for its auction appearances. Apparently unique, a fascinating coin, well-centered and nicely toned. Extremely fine.
From the "Collection sans Pareille" of Ancient Greek Fractions, ex Numismatica Ars Classica 2, 21 February 1990, 177 and Münzen und Medaillen 41, 18 June 1970, 125.