North Vietnam, 35 Years Communist Party of Indochina, February 3rd, 1965, Michel Nr. 347-353; A total of seven stamps were issued. Five with a 6 xu nominal and two with a 12 xu nominal. The stamps were perforated 11.0. The stamps (6 xu nominal and 12 xu nominal in separate sheets) were printed attached to each other within the sheet.
Interestingly enough one of the communist party official honored in the set fell out of grace afterwards. So sometimes you see the one stamp blocked out if the seller is Vietnamese. Apparently it is not politically correct to still show the face of the disgraced politician.
Very rare local letter (full contents preserved) featuring one of the 12xu stamps from the set on a mailing from Yen Thanh (small post office) to Hanoi in February of 1965. Most local letters were destroyed in the multi-decadal war, the tropical climate or recycling due to raw material shortages.
Registered letter sent to Klewitz in February of 1965. It contains the entire set in front plus some other North Vietnamese stamps on the reverse. The overall franking amounts to 1.14 Dong which is just a whisker above the required tariff of 1.10 Dong for a standard registered letter of 20 grams.
Mixed franking of one of the 6xu values together with the 50xu Domestic Wildlife stamp for an overall postage of 56xu. The required standard letter rate to Western countries was 50xu as of March 1st, 1960 but the tariff for letters to Eastern (socialist) countries) was only 12xu.It appears the sender was not aware of this.
Registration Nr. 101020