Hong Kong
Visar nu: Hong Kong - Postfrimärken (1862 - 2024) - 1 frimärken.
2016
The 57th International Mathematical Olympiad - Honk Kong, China
6. juli WM: Inga Design: Carl Cheng Chi Ming Perforering: 14
![[The 57th International Mathematical Olympiad - Honk Kong, China, Typ ]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Hong-Kong/Postage-stamps/2012-b.jpg)
