Rare type naming the clan name - 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 You Shi 右氏 (“right, Shi”). 139mm long, 16.29 grams. Hartill #4.42 type #4.aa.

Exceptional high quality piece. Shi 氏 is a clan name, the reference is perhaps to some group of people who used this name who cast these knives. Rare early type with a rare reverse inscription.