North Vietnam, Domestic Birds, October 31st, 1966, Michel Nr. 456-461; Six stamps in the nominals of 12 xu (four stamps), 20 xu and 30 xu were issued perforated…
North Vietnam, Domestic Birds, October 12th, 1972, Michel Nr. 701-706; Six stamps wit the nominals of 12 xu (two stamps), 30 xu, 40 xu, 50 xu and 1 Dong…