战国时期,燕国 明刀钱币。深色绿铜,偶有青柠色泽。CHINA. Zhou Dynasty, ca. 1046-256 B.C. Warring States Period, ca. 475-221 B.C. State of Yan. Ming Knife Money, ND (ca. 400-220 B.C.). VERY FINE.。15.67 gms. H-4.40/4.b. "You yi" (right 1). Dark patina with hints of lime green.。