BITHYNIA. Kalchedon. Circa 340-320 BC. Half Siglos (Subaeratus, 17 mm, 3.85 g), a contemporary plated imitation. Bull standing left on grain ear. Rev. Quadripartite incuse square of mill-sail pattern. SNG BM Black Sea 118-23. Beautifully toned. Some breaks in plating, otherwise, good very fine.