Watch List notes:

THESSALY, Pharsalos. 4th-3rd centuries BC. Æ Trichalkon (18mm, 4.00 g, 4h). Helmeted head of Athena Parthenos facing slightly left, with shield and spear over shoulder; monogram to left / Armored Thessalion warrior on horse rearing right, brandishing flail; soldier behind to left. Lavva 316–40 var. (unlisted dies); cf. BCD Thessaly II 674.7 (ethnic); HGC 4, 649. Good VF, dark green patina. A particularly attractive and well struck obverse.

From the BCD Collection.

Though of a distinctly lower weight than expected, this appears to have been simply struck on a smaller flan, though with the normal trichalkon dies.