Gold Proof Set, 1979, comprising four 400-yuan, commemorating the 30th Anniversary of the Founding of the People's Republic of China (F.1, 2, 3, 4), brilliant, in case of issue

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Gold Proof Set, 1979, comprising four 400-yuan, commemorating the 30th Anniversary of the Founding of the People's Republic of China (F.1, 2, 3, 4), brilliant, in case of issue