BITHYNIA, Kalchedon. Circa 260-220 BC. AV Stater (8.11 g). In the name and types of Alexander III of Macedon. Helmeted head of Athena right / Nike standing left, holding wreath and stylis; KA monogram in left field, monogram below left wing. A small edge cut and tiny marks. A bit harshly cleaned. Very rare civic issue. Price 914 (Kallatis), SNG Saroglos 115, Grade:1