Watch List notes:

KINGS OF BITHYNIA. Prusias I Chloros, circa 230-182 BC. Tetrachalkon (Bronze, 23 mm, 7.79 g, 3 h), Nikomedia. Diademed head of Zeus to right; on neck, countermark: Nike advancing left, holding wreath and palm, within circular incuse. Rev. BAΣΙΛΕΩΣ - ΠΡΟ[ΥΣΙΟΥ] Thunderbolt within oak wreath. Leu Web Auction 5 (2018), 217 (with identical countermark). RG 12. SNG von Aulock 245. Patina stripped and somewhat rough, otherwise, fine.