Rod, you want to replace some of those used stamps with unused? Be glad to send you any of my duplicates.
I can send my WW in return, (all sorts, too busy to be selective)
And do you know the story of how an Austrian stamp worked its way on to one from Ecuador?
The Ecuadorian stamps were printed in Austria.
The "labels" or "dummy stamps" were possibly proofs or tests for colours and designs for approval from Ecuador.