Watch List notes:

Thrace, Byzantion Æ23. Dioscouri-, magistrate. Late 2nd century BC. Diademed head of Poseidon right / Ornamental trident; civic monogram and Π/ ΕΠΙ to right, ΔΙΟΣΚΟΥΡΙ to left. Schönert-Geiss 1101 (V24/R56, D.I. Mosnjagin collection, Moskow) (this coin) = CΝΤ 6278 (this coin); HGC 3.2, 1417. 8.73g, 23mm, 11h.

Very Fine.

From the William Stancomb Collection, acquired in 1984;
This coin published in E. Schönert-Geiss, Die Münzprägung von Byzantion, (Amsterdam, 1970);
This coin published in Corpus Nummorum (www.corpus-nummorum.eu).