Watch List notes:

Thrace, Byzantion in alliance with Kalchedon Æ 25mm. 3rd century BC. Veiled head of Demeter to right / Poseidon seated to right, holding aphlaston and trident; ΒΥΞΑNT to right, ΚΑΛΧΑΔ to left, ΔA in inner right field. Schönert-Geiss 1258; SNG BM Black Sea 82; HGC 3.2, 1428. 11.28g, 25mm, 1h.

Near Extremely Fine; somewhat pitted rev.

From the inventory of a UK dealer.