Watch List notes:

THRACE, Byzantion. Alliance coinage with Kalchedon. Late 3rd-2nd centuries BC. Æ (23.5mm, 9.51 g, 12h). Wreathed and veiled head of Demeter right / Poseidon seated right, holding aphlaston and trident; no control marks. Schönert-Geiss, Byzantion 1276–82; Türkoğlu A2a; HGC 3, 1428. Dark green-brown surfaces, some encrustation, light roughness. VF.