North Vietnam, Bamboo Types, February 5th, 1967, Michel Nr. 469-474; Six values were issued in the nominals of 12 xu (four stamps), 30 xu and 50 xu. They were released perforated 12.0-11.5 and im-perforated.
Here is the mint im-perforated set in pairs:
Here is a rare express mail letter mailed to Klewitz in September of 1967 featuring the entire im-perforated set. Im-perforated stamps n postally used covers are very rare. The overall franking amounted to 1.28 Dong which was slightly above the required tariff for a standard express mail letter to West Germany (1.00 Dong tariff). Fulda arrival cancel n the reverse.
Rare single franking of the 12xu Bamboo stamp on a letter sent to Budapest, Hungary.
Mixed franking of the 1d value of the Nguyen Du set together with the 50xu Bamboo stamp and 12xu National Liberation Front stamp for an overall postage of 1.62D.
Mixed franking of the 50xu Bamboo stamp together with the 2xu Mountain Provinces stamp for an overall postage of 52xu on a letter to Czechoslovakia in January of 1968.
Very rare registered express mail letter sent to Klewitz in February of 1973. The letter carried the entire set plus some im-perforated stamps from the color wood print and bamboo set. Im-perforated stamps on postally used covers era very rare. The overall postage of the letter amounted to 2.58 Dong which appears to be in excess of the required tariff. A standard 20 gram registered express mail letter to West Germany only cost 1.60 Dong.
Registration Nr. 101431