Watch List notes:

KINGS OF BITHYNIA. Prusias II Cynegos, 182-149 BC. Tetrachalkon (Bronze, 21 mm, 6.12 g, 12 h). Head of Dionysos to right, wearing ivy-wreath. Rev. BAΣIΛE[ΩΣ] ΠΡΟYΣIO[Y] Centaur advancing right, playing lyre; to lower right, monogram. RG p. 225, 26. SNG Copenhagen 636-7. Attractive earthen highlights. Minor adjustment marks as made, otherwise, very fine.