Pre-1994 map, showing the 4 provinces of Transvaal, Natal, Orange Free State, Cape Province and the homelands:
 

Post-1994 map showing the 9 provinces
note: the Northern Province changed its name to Limpopo in 2002
 

Post-1994 map with some main cities listed:


1885 map:
 

Close-up of the Western Cape:


Close-up of the Eastern Cape: