South Vietnam, Successful Battles near Binh Long, November 25th, 1972, Michel Nr. SVN 517-518; Two stamps in nominals of 5D and 10D were issued in perforation 13.5.
Here is the mint set.
and here 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 in matching sheet margins.
Enpreuves de Luxe; Printed on cardboard paper.
Mixed franking of the 40D Harvest stamps (2) together with the 5D Binh Long stamp paying an overall postage of 85D on an international air mail letter sent from Saigon to West Germany in February, 1973.
Multiple franking of the 5D value (2) paying 10D on a domestic air mail letter sent to Nha Trang.
Mixed franking of the 25D Interpol stamp together with stamps from the Year of the Buffalo, Harvest, Successful Victories at Binh Long, World Telecommunications Day, Civil Self Defense and National development sets paying an overall postage of 110D on an international air mail letter sent from Saigon to France in 1973.
Single franking of the 10D value on a domestic letter sent from Can Ranh to Saigon in March of 1973.
Single franking of the 10D value on a philatelic domestic letter sent by the Indonesian Peace Keeping Force from Pleiku to a Major in Saigon in April of 1973.
Single franking of the 10D value on a domestic letter sent from Da Nang to Nha Trang in March of 1973.
Registration Nr. 201230