High grade AE17 (dichalkon), Magistrate Ippaitas, c.172-171 BC, Thessaly, Thessalian League  

IΠΠAI-TAΣ above and beneath helmeted head of Athena right / ΘEΣ-ΣAΛΩN above and beneath horse trotting right. 17mm, 4.87 grams. Rogers 44; BCD Thessaly 840; BMC 64cf.

Rare, especially in high grade. For a nice example (still, not as high quality as this piece), see CNG electronic auction 503, lot 146, estimate $100, sold for $800 + fees.