Watch List notes:

MACEDON. Skione. Circa 510-470 BC. Diobol (Silver, 12 mm, 0.95 g). Head of a lion to right, with open mouth and protruding tongue . Rev. Quadripartite incuse square. Cf. Skioni 37 (E26/O29, but these dies seem unrecorded). Nearly extremely fine.
From the "Collection sans Pareille" of Ancient Greek Fractions, and from the A. Ghertsos collection, Münzen und Medailen FPL 527, November/December 1989, 30 (as Akanthos).