Unified Vietnam, Traditional Musical Instruments, December 5th, 1985, Michel Nr. 1643-1649; Seven stamps in nominals of 1D (two stamps), 2D (two stamps), 3D, 4D and 6D were issued…
Unified Vietnam, Traditional Musical Instruments , September 4th, 2001, Michel Nr. 3185-3190; Six stamps in nominals of 800D (three stamps), 2,000D, 6,000D and 9,000D were issued in perforation…