1979年精製套币四枚一组。为纪念中华人民共和国建国30週年铸打。镜面底板,霜化图文,光彩耀目。NGC PROOF-69 ULTRA CAMEO (1) & PROOF-70 CAMEO (3).CHINA. Four Piece Proof Set, 1979. NGC PROOF-69 ULTRA CAMEO to PROOF-70 CAMEO.Fr-1/4; KM-PS1. Struck to commemorate the 30th anniversary of the Peoples Republic of China. Brilliant with hard mirror fields and frosted cameo devices.