The List of changes of South African banknotes refer to the ​changes effected on banknotes issued by the previous Governors of the South African Reserve Bank. W H Clegg (17 December 1920 to 31 December 1931)J Postmus (1 January 1932 to 30 June 1945)M H de Kock (1 July 1945 to 30 June 1962)G Rissik (1 July 1962 to 30 June 1967)T W de Jongh (1 July 1967 to 31 December 1980)G P C de Kock ( 1 January 1981 to 7 August 1989)C L Stals (8 August 1989 to 7 August 1999)T T Mboweni (8 August 1999)