Sýni: Saó Tóme og Prinsípe - Venjuleg frímerki (1970 - 1979) - 1 frímerki.
1973
The 100th Anniversary of International Meteorological Organization or WMO-IMO
15. desember WM: Ekkert Götun: 13
![[The 100th Anniversary of International Meteorological Organization or WMO-IMO, tegund DN]](https://www.stampworld.com/media/catalogue/Sao-Tome-And-Principe/Postage-stamps/DN-s.jpg)
