Watch List notes:

Thessaly, Pharsalos (Mid 5th Century BC), AR Obol, head of Athena right, wearing earring and a crested Athenian helmet adorned with two coiled serpents, rev. horse's head and neck right, all in an incuse square, 10.5mm, 0.91g, 1h (Lavva 4e this coin; BCD [Thessaly] 627 this coin), lightly toned, very fine, rare.
Provenance
BCD Collection, CNG Triton XV, 3 January 2012, lot 627
Estimate: £120 - £180