This badge was never worn by the Rhodesian SAS. They wore British cloth SAS badges in Malaya as shown in many photos.
One dealer in England did have the slider stamped with REUTELER MFG RHOD
and sold them as genuine but they weren't.
2018-06-18 21_42_09-SAS Cap Badge 1st Type Brass Slider 1950 to 1953 - _C_ Squadron Rhodesian _ .jpg