Hong Kong
Viser nå: Hong Kong - Postfrimerker (1862 - 2024) - 1 frimerker.
2016
The 57th International Mathematical Olympiad - Honk Kong, China
6. July VM: Ingen Design: Carl Cheng Chi Ming Perforering: 14
![[The 57th International Mathematical Olympiad - Honk Kong, China, type ]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Hong-Kong/Postage-stamps/2012-b.jpg)
