中国人民银行第四版人民币一元,1980年,正面印刷 错体,红色油墨过多致底纹色过深,许义宗教授藏品, PMG鑑定,评63,背面锈渍,唯并未注明错体。People s Bank of China, 4th series renminbi, 1980-1990, 1 yuan, 1980, ERROR NOTE, serial number GW28249991, inking error on the obverse so that the red underprint appears to be darker and the vignette of the stylised birds at the centre paradoxically appears to be missing a layer of ink and looks to be a lighter colour,(Pick 884a), PMG 63 Choice Uncirculated (Stains) and an unusual appearance