Watch List notes:

THRACE, Byzantion. Alliance coinage with Kalchedon. Late 3rd-2nd centuries BC. Æ (26.5mm, 12.23 g, 12h). Wreathed and veiled head of Demeter right / Poseidon seated right, holding aphlaston and trident; ΔA to inner right (traces visible). Schönert-Geiss, Byzantion 1257–62; Türkoğlu A2a; HGC 3, 1428. Brown surfaces, some roughness, area of weak strike. Near VF.