South Vietnam, 1. Anniversary of the Acceptance of the Democratic Constitution, June 9th, 1968, Michel Nr SVN 426-427; Two stamps in nominals of 1D and 20D were issued in perforation 13.5.
Here is the mint set
Here is the postally used set
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; printed on thin card board paper. Government Printing Bureau Tokyo printed at bottom right.
Multiple franking of the 1D value (4) paying an overall postage of 4D on a domestic letter sent by a member of the military (KBC 3025, a yet unknown office that is not listed on the SICP KBC list) from My Tho to a civilian in Saigon in November of 1970. Note that members of the military only had to pay 50% of the standard letter rate.
Single franking of the 20D value on an international air mail letter sent from Hue to Switzerland.
Multiple franking of the 20D value (3) paying an overall postage of 60D on an international air mail letter sent from Nha Trang to the United States in February of 1972.
Mixed franking of the 20D Acceptance of the Democratic Constitution stamps (6) together with two of the 8D Destructions in the TET Offensive ramps paying an overall postage of 136D on a registered international air mail letter sent from Saigon to the United States in September of 1971.
Mixed franking of the 20D Acceptance of the Democratic Constitution stamp together with the 30D Bird stamp paying an overall postage of 50D on a rare express mail letter sent from Saigon to Switzerland in July of 1970. Neuhausen am Rhein arrival cancel on the reverse.
Registration Nr. 200880