It's the ultimate collectible, it speaks about the mania of collecting, the thrill of the chase. And there is only one. It is the Mona Lisa of philately, the most valuable stamp in the world. Take a look.
Useful links: https://www.theguardian.com/world/2021/apr/28/worlds-most-valuable-stamp-expected-to-sell-for-up-15m-in-london I https://www.sothebys.com/en/digital-catalogues/three-treasures-collected-by-stuart-weitzman
