1991年50元。熊猫系列。错版。 小日期。错版,背面铸穿。"铸穿"标注非常小,放大镜下仍不显眼。深打,光泽诱人。 CHINA. Mint Error -- Reverse Struck Through -- 50 Yuan, 1991. Panda Series. NGC MS-68. Fr-B5; KM-349; PAN-143b. Small Date variety. The noted "strike through" is extremely small and hard to see, even with magnification. Sharply struck, brilliant and attractive.