The People's Republic of China, a proof set of 4x gold 400 yuan, commemorative of the 30th Anniversary of Founding of PRC, each coin weighs 1/2 oz containing 22K pure gold, AGW 2 oz, 'Tiananmen Square', 'Mao Zedong Memorial', 'Great Hall of the People' and 'People's Heroes Monument',graded NGC PF 65 Cameo, PF 63 Cameo, PF 65 Cameo and PF 64 respectively, with original box and certificate, serial number 51469, #6374448-007, 6374448-002, 6374448-006 and 6374448-003 (a set of 4)..
Estimate: 28000 - 38000