Fantastic vintage Lima train set, new old stock South African Railways set, Suid Afrikaanse Spoorwee

Amazing vintage South African Railways Lima train set, new in the box, I am 99,9% sure that this was never played with, the contents just look mint mint mint and you can tell by how the pieces are still in the box that they were never handled. I guess this is 1970's or 80's? Maybe a collector can verify this......I will sell this as fully working (although not tested). The box has some signs of wear and tear and some dirt that has settled inside, it still has its original plastic cover! Very unusual to pick this kind of thing up in unplayed condition but it happens....... Size of the box is 49.5 cm x 18.5 cm.