Portugal
Viser nå: Portugal - Postfrimerker (1853 - 2024) - 1 frimerker.
2018
International Physics Olympiad - Lisbon, Portugal
21. July VM: Ingen Arkstørrelse: 50 Design: João Machado & Victor Hugo Gravering: Imprensa Nacional Casa da Moeda. Perforering: 12¼ x 12
![[International Physics Olympiad - Lisbon, Portugal, type EKO]](https://www.stampworld.com/media/catalogue/Portugal/Postage-stamps/EKO-s.jpg)
![[International Physics Olympiad - Lisbon, Portugal, type EKP]](https://www.stampworld.com/media/catalogue/Portugal/Postage-stamps/EKP-s.jpg)
