A hybrid flag showing the old flags of the Republic of South Africa and the Republic of Rhodesia.
Derived from: 

https://commons.wikimedia.org/wiki/File:Flag_of_Rhodesia_(1968%E2%80%931979,_3-2).svg
Attribution: Sangjinhwahttps://commons.wikimedia.org/wiki/File:Flag_of_South_Africa_(1928%E2%80%931994).svg
Parliament of South Africa (Vector graphics image by Denelson83)
Donald Trung Quoc Don (徵國單) made the SVG file using Inkscape.