Unified Vietnam, World Communication Year, September 30th, 1983, Michel Nr. 1362-1366, Block 23; Four stamps and one souvenir-sheet in the nominals of 50xu, 2D, 8D, 10D and 10D…
Unified Vietnam, World Communication Year, November 1st, 1983, Michel Nr. 1381-1382; Two stamps, both with a 50xu nominal, were issued in perforation 10.75. After the Viet Minh issue…