දැන් පෙන්වන්නේ: උතුරු වියට්වනාමය - නිල මුද්දර (1953 - 1968) - 6 මුද්දර .
1957
World Trade Union Congress - Leipzig, Germany
12. August WM: කිසිවක් නැත සිදුර: 12½
![[World Trade Union Congress - Leipzig, Germany, වර්ගය F]](https://www.stampworld.com/media/catalogue/North-Vietnam/Official-stamps/F-s.jpg)
![[World Trade Union Congress - Leipzig, Germany, වර්ගය F1]](https://www.stampworld.com/media/catalogue/North-Vietnam/Official-stamps/F1-s.jpg)
![[World Trade Union Congress - Leipzig, Germany, වර්ගය F2]](https://www.stampworld.com/media/catalogue/North-Vietnam/Official-stamps/F2-s.jpg)
![[World Trade Union Congress - Leipzig, Germany, වර්ගය F3]](https://www.stampworld.com/media/catalogue/North-Vietnam/Official-stamps/F3-s.jpg)
1957 -1958
One Pillar Pagoda
WM: කිසිවක් නැත සිදුර: 12½
![[One Pillar Pagoda, වර්ගය G]](https://www.stampworld.com/media/catalogue/North-Vietnam/Official-stamps/G-s.jpg)
![[One Pillar Pagoda, වර්ගය G1]](https://www.stampworld.com/media/catalogue/North-Vietnam/Official-stamps/G1-s.jpg)