Watch List notes:

THESSALY. Perrhaiboi. Circa 462/1-460 BC. Obol (Silver, 11.5 mm, 0.86 g, 3 h). Forepart of wolf to left; border of dots. Rev. ΠΕ Head of a bridled horse to right; all within incuse square. BCD Thessaly I, 2011, 1236 (this coin). Liampi, 1996, I, III, 6 var. (no monogram on the obverse, but from the same reverse die). Very rare. An attractive piece, with a splendid wolf's head, very similar to the slightly earlier issues of Argos, as BCD Peloponnesos 1008. Some minor reverse flatness, otherwise, about extremely fine.
From the "Collection sans Pareille" of Ancient Greek Fractions and from the BCD Collection, Nomos 4, 10 May 2011, 1236.