Unified Vietnam, 5 Years of Cooperation Agreement with the Soviet Union, November 7th, 1983, Michel Nr. 1383-1386; Four stamps were issued in nominals of 20xu, 50xu, 4 D…
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Unified Vietnam, 5 Years of Cooperation Agreement with the Soviet Union, November 7th, 1983, Michel Nr. 1383-1386; Four stamps were issued in nominals of 20xu, 50xu, 4 D…