Now showing: Switzerland - UN (1950 - 1963) - 2 stamps.
4. February WM: None Perforation: 11¾
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![[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)
