Watch List notes:

THRACE, Byzantion. Alliance coinage with Kalchedon. Late 3rd-2nd centuries BC. Æ (25mm, 10.60 g, 11h). 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. Brown surfaces, brush marks, overstruck on uncertain issue. VF.