Watch List notes:

Thrace, Byzantion in alliance with Kalchedon Æ 27mm. 3rd century BC. Veiled head of Demeter to right / Poseidon seated to right, holding aphlaston and trident; ΒΥΞΑNT[I] to right, ΚΑΛΧΑΔ to left. Schönert-Geiss 1276-82; HGC 3.2, 1428; CNG e514, lot 54 (hammer: 950 USD). 12.60g, 27mm, 1h.

Good Extremely Fine; flan crack, otherwise a stellar example.

From the inventory of a UK dealer.