South Africa - Durban Light Infantry (DLI) Small Pair of Matched White Metal Collar Badges

I am used to seeing larger white metal versions than these for the Durban Light Infantry so perhaps these were smaller officers' issues. Confirmation welcome. I do not believe these relate to the Durham Light Infantry. Circa 1.1cms tall and 3.4cms wide with two original 'D' shaped loops to the reverse of each. Comm FB