Watch List notes:

BRUTTIUM. Rhegion. Circa 450-445 BC. Hexas (Silver, 7 mm, 0.10 g, 12 h). Lion's mask facing, within border of dots. Rev. R E with the small letters V / S between them; all within a border of dots. Herzfelder -. Apparently unpublished, but for the basic type cf. HN III 2482 and SNG ANS 656. Of great rarity. A splendid little fellow! Attractively toned and very well-struck. Extremely fine.
From the "Collection sans Pareille" of Ancient Greek Fractions and from the collection of Leo Mildenberg.

Exactly what the tiny extra letters on the reverse are supposed to mean, and there is possibly another below, is completely uncertain.