The warring states period, bronze, pointed piece of knife-shaped coinSize: 16.5 cm wide and 2.7 cm thick long 0.3 cm weighs 53.1 gIntroduction: knife-shaped coin is also called the "dao" (cargo), is one of the bronze COINS of the spring and autumn period and the warring states period.Its shape by the spring and autumn period, farm tools, hand tools and daily utensils, knives descended.The items for the pointed knife, sharp, head end first show wide blade, arc arc force.Thin blade thick back, back to handle the interrupt for "broken ridges" or the "breaking edge", a round knife ring.