Thrace, Byzantion, 3rd century BC. Æ (23,97 mm, 8,70 g). Alliance issue with Kalchedon. Veiled head of Demeter r., wearing grain wreath. Poseidon seated r. on rocks, holding aphlaston and trident; in l. field, monogram. SNG BM Black Sea 83-4 var. (controls); HGC 3.2, 1428. Very fine.