EUBOIA. Karystos. Circa 450-400 BC. Hemiobol (Silver, 7 mm, 0.29 g, 11 h). Bull's head to right. Rev. Κ - Α Palm tree. BCD Euboia 551 ( this coin, but as an obol ). Apparently unique. Lightly toned and clear. Slightly rough surfaces, otherwise, about extremely fine.

From the "Collection sans Pareille" of Ancient Greek Fractions, and from the BCD Collection, Lanz 111, 25 November 2002, 551.

In the BCD Collection catalogue this coin was termed an obol - surely a misprint since it only weighs 0.29 g - and dated to c. 465 BC - though the style and the lettering is clearly later.