Does anyone know these rims?

Hello I have found a Cobra in South Africa, which is dusty for almost 30 years in a hall, but almost looks new. Manufacturer is Shamrock, South Africa. After the import to Germany I have compiled a documentation of more than 25 pages ( Ford V8 351 W, complete Edelbrock Performer Kit, Toploader 4 gear, Jaguar XJ6/XJ12 axles and brakes ). What I need now is an information about the rims ( back 10 x 15 with 275/60 15, front 8 x 15 with 235/60 15 ). Ht someone can give me a hint, who the manufacturer of these rims is. Unfortunately, no marking on the rim is to be found. Also the manufacturer of the shifting rod is not yet identified and the cladding of the steering stick is missing, also hints would be nice. Would again be further building blocks in the documentary. I have attached pictures. For any hint I would be grateful. Greeting Pluemo