Hi Alan,
I have a couple of photos of early SAAF Mirage IIICZ carrying 2x Aim9B and a Matra 530 missile on the belly, and Matra 530 and a pair of RP18 500lt tanks, thes would all be in the 1970's
As Nick mentioned above, there are many variations of cammo/markings/weapon configurations later in their lives so the specific aircraft/period would be important