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,光泽充沛。NGC PROOF-68 (1), PROOF-68 CAMEO (1), PROOF-69 CAMEO (1), & PROOF-69 ULTRA CAMEO (1).CHINA. Four Piece Proof Set, 1979. NGC PROOF-68 to PROOF-69 ULTRA 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.