Suisse
Montre maintenant: Suisse - NU (1950 - 1963) - 1 Timbres-poste.
1963
UNCSAT - United Nations Conference on Science and Technology
4. février WM: Aucun Perforation: 11¾
![[UNCSAT - United Nations Conference on Science and Technology, type I]](https://www.stampworld.com/media/catalogue/Switzerland/UN/I-s.jpg)
![[UNCSAT - United Nations Conference on Science and Technology, type J]](https://www.stampworld.com/media/catalogue/Switzerland/UN/J-s.jpg)
