Watch List notes:

KINGS of BITHYNIA. Prusias II Cynegos. 182-149 BC. Æ (19.5mm, 12h). Nikomedeia mint. Wreathed head of Dionysos right / Centaur advancing right, playing lyre. RG 26; HGC 7, 629. Dark green patina, lighter in fields. In NGC encapsulation 5872733-019, graded Ch Fine.

From the Robert W. Bartlett Bequest Sold for the Benefit of the American Numismatic Society, purchased from London Coin Galleries, Mission Viejo, CA, May 1981.