Watch List notes:

BITHYNIA. Dia. Circa 85-65 BC. Tetrachalkon (Bronze, 20 mm, 8.35 g, 12 h), struck under Mithradates VI Eupator. Laureate head of Zeus to right. Rev. ΔΙΑΣ Eagle standing left on thunderbolt, head right; monogram to left. SNG BM Black Sea 1562. SNG Cop. 404. Glossy dark patina. About extremely fine.