Quote:
These stamps are normally collected in pairs as they were printed se-tenant with alternate stamps in English and German.
I guess the one shown by Nora must be the English one from the se-tenant pair then, as that is not German.
The language is Afrikaans and it is a variant of Dutch.
German: Südwest Afrika / Briefmarke
Dutch: Zuidwest-Afrika / Postzegel
Afrikaans: Suidwes-Afrika / Posseël.
In this case, the diaresis is the Dutch trema that separates to vocals that would otherwise be a diphthong: pos-se-el and not pos-seel.
In German it would be an umlaut that changes the pronunciation of the vowel. An umlaut over an e does not work.