Unified Vietnam, International Year of Space, April 12th, 1992, Michel Nr. 2431-2436; Six stamps in nominals of 400D, 500D, 3,000D, 4,000D, 5,000D and 6,000D were issued in perforation…
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Unified Vietnam, International Year of Space, April 12th, 1992, Michel Nr. 2431-2436; Six stamps in nominals of 400D, 500D, 3,000D, 4,000D, 5,000D and 6,000D were issued in perforation…