Watch List notes:

KINGS OF BITHYNIA. Prusias I Chloros, circa 230-182 BC. Tetrachalkon (Bronze, 21 mm, 4.47 g, 3 h). Diademed head of Zeus to right; to left, countermark: Nike advancing left, holding wreath and palm, within round incuse. Rev. BAΣΙΛΕΩΣ - ΠΡΟΥΣΙΟΥ Thunderbolt; all within wreath. Naumann 35 (2015), 149 (with same countermark). RG 12. SNG von Aulock 245. Worn but with an interesting countermark. Fine.