Watch List notes:

SICILY. Himera. Circa 455-430/25 BC. Hexas or Dionkion (Silver, 7 mm, 0.12 g). Corinthian helmet to right. Rev. Two pellets. Buceti 30 (this coin) = HGC 2, 460 (this coin). Very rare. Toned and clear. Some roughness, otherwise, about extremely fine.
From the "Collection sans Pareille" of Ancient Greek Fractions, and from the collection of A. D. Moretti, The New York Sale XIV, 10 January 2007, 40.