I try to collect one nice cover from every country in the world, and I need YOUR HELP! Below you can browse through my collection, if you see your country is missing (or you can send me a better cover than the one I already have), please contact me :)
I prefer covers with WWF stamps, because this is my main (topical) collection. I also collect other WWF items, like local FDC / MC etc.
I can send you a nice cover from Belgium in return, or Belgian mint stamp(s) - as you prefer. Have a look at my Delcampe store, all items that are for sale can be exchanged too.
Another really great WWF cover from Macedonia, thank you very much Ana!