North Vietnam, Poisonous Snakes, November 30th, 1970, Michel Nr. 641-644; Four stamps with the nominals of 12 xu, 20 xu, 50 xu and 1 Dong were issued perforated 12:11.75…
Unified Vietnam, Poisonous Snakes, May 1st, 1989, Michel Nr. 2029-2035; Seven stamps in the nominals of 10D (two stamps), 20D (two stamps). 30D (two stamps) and 50D were…