International Physics Olympiad - Yogya, Indonesia 2017
Now showing: Slovakia - Postage stamps - 2017 - International Physics Olympiad - Yogya, Indonesia - 1 stamps.
2017
International Physics Olympiad - Yogya, Indonesia
10. February WM: None Sheetsize: 50 Design: Zdenek Netopil Perforation: 11½
![[International Physics Olympiad - Yogya, Indonesia, type AAE]](https://www.stampworld.com/media/catalogue/Slovakia/Postage-stamps/AAE-s.jpg)