Article from the The South African Military History Society (March 1967) :
" The unit had a badge of which only one hundred were struck. It was not worn while on patrol. It was made up of a laurel wreath surmounted by the letter "D" - for Droughts' - enclosing a diagrammatic representation of the cardinal points of the compass, with the motto of the unit below it; "Quod Age Agis"' - "Do what has to be done."
Due to the small number of badges that were struck,this is surely a great prize for collectors of regimental insignia. "
http://samilitaryhistory.org/archiv11.html