WORLD COINS, CHINA, Warring States, State of Qi, 400-220 BC, Bronze Knife money, Five Character type, obv. an yang zhi fa hua (the authorised currency of An Yang) in archaic script, rev. three lines and circle, 183mm, 49.49g (H 4.1s). Very fine, green-black patina with some green encrustation £1,000-1,500