Republic of Transkei was a Bantustan—an area set aside for members of a specific ethnicity—and nominal parliamentary democracy in the southeastern region of South Africa. Transkei represented a significant precedent and historic turning point in South Africa's policy of apartheid and "separate development"; it was the first of four territories to be declared independent of South Africa. Throughout its existence, it remained an internationally unrecognised, diplomatically isolated, politically unstable de facto one-party state, which at one point broke relations with South Africa, the only country that acknowledged it as a legal entity. In 1994, it was reintegrated into its larger neighbour and became part of the Eastern Cape province.
I received this mixed Transkei cover from South Africa. You can't use Transkei stamps for international mail, but they can be used together with South African stamps.
Stamps on cover:
Famous People of Medicine (complete set), issued on 05.10.1982.
National Stamp Day - Cape of Good Hope Postal Stones (from set of five), issued on 09.05.1992.
Wildlife - The Big 5, (from set of five), issued on 25.04.2001.
Thank you very much Willy!