North Vietnam, Harmful Insects, July 24th, 1965, Michel Nr. 379-384; Six values were issued in the nominals of 12 xu (four stamps), 20 xu and 30 xu. The…
Unified Vietnam, Harmful Insects, September 25th, 1982, Michel Nr. 1258-1265; Eight stamps in the nominals of 30 xu (two stamps), 40 xu, 50 xu (two stamps), 60 xu and…