Unified Vietnam, 20. Anniversary of the UN Conference for Environmental Protection, June 1st, 1992, Michel Nr. 2453-2454; Two stamps with nominals of 200D and 4,000D were issued in…
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Unified Vietnam, 20. Anniversary of the UN Conference for Environmental Protection, June 1st, 1992, Michel Nr. 2453-2454; Two stamps with nominals of 200D and 4,000D were issued in…