Rare early high quality knife money, city of Yi, ca.400-220 BC, "Warring State" period, Yan Kingdom under the Eastern Zhou Dynasty

Large archaic Chinese character Yi (also can be read as "Ming") / Two large archaic characters Zuo Ri (“left sun”). 140mm long, 21.50 grams. Hartill #4.41, type 5.al

Rare and high quality piece, very early issue knive, quite a bit heavier than the later issues.