THRACE. Byzantion. Late 3rd-2nd centuries BC. AE (Bronze, 27 mm, 9.60 g, 12 h), alliance issue with Kalchedon in Bithynia. Veiled head of Demeter to right, wearing wreath of grain ears. Rev. ΒΥZANTI - KAΛΧΑΔ Poseidon seated right on rock, holding aphlaston in his right hand and trident in his left; to right, monogram. HGC 3.2, 1428. Schönert-Geiss 1257-62. SNG BM Black Sea 82. A very well centered example. Some deposits, otherwise, good very fine.