South Vietnam, Labor Day, May 1st, 1967, Michel Nr. SVN 384-387; Four stamps in nominals of 0.50D, 1D, 3D and 8D were issued in perforation 13:12.5.
Here is the mint set
Complete mint sheet of the 0.50D value.
Mint blocks of four with sheet number
and here the postally used set
Large postally used block of nine of the high 8D value, probably from a package wrapper.
These stamps were not officially released imperforate, however, a small number of imperforate trial proofs have come to market. Here is the imperforate set.
Enpreuves de Luxe; Imprimerie Des Timbres-Poste, Paris inscribed at bottom right.
Mixed franking of the 2D Private Ownership stamp together with stamps from the Flowers, UNICEF, Labor Day, National Unity and 3.Anniversary of the Revolution sets paying an overall postage of 28.70D on an international letter sent from Danang to West Germany.
Single franking of the 3D value on an official letter sent from Poa Vinh to Saigon in May of 1969.
Multiple franking of the 3D value paying an overall postage of 6D on a domestic letter sent from Can Tho to Nha Trang in February of 1970.
Multiple franking of the 3D value paying an overall postage of 6D on a domestic letter sent from Hue to Nha Trang.
Mixed franking of the 9D Trans-Vietnamese Railway stamp together with the 3D Labor Day and 4D Children Protection stamp paying an overall postage of 16D on an international ir mail letter sent from Can Tho to France in January of 1970.
Single franking of the 8D value on a domestic registered letter sent from Saigon to Nha Trang in June of 1968. Illegible transit/arrival cancel on the reverse.
Mixed franking of the 20D Urban Development stamps (2) together with the 8D Labor Day stamp paying an overall postage of 48D on rare express air mail letter sent from Saigon to Australia in March of 1968.
Registration Nr. 200710