International Physics Olympiad - Lisbon, Portugal 2018
Now showing: Portugal - Postage stamps - 2018 - International Physics Olympiad - Lisbon, Portugal - 2 stamps.
2018
International Physics Olympiad - Lisbon, Portugal
21. July WM: None Sheetsize: 50 Design: João Machado & Victor Hugo Engraving: Imprensa Nacional Casa da Moeda. Perforation: 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)
