Yes indeed. Rhodesia (now Zimbabwe) had broken away from the UK and self-declared independence, which led to total international sanctions against it, apart from South Africa, which has a border with it and was always the main trading partner. The old Central African Airways was broken up and most of their Viscounts moved to the new Air Rhodesia, who devised their own routes for parts sourcing; there had always been a significant aviation presence and competence in Rhodesia, and the air force from there had played a significant part in WW2. But the Viscounts were past middle age.

The Eastern 720s had meanwhile passed to Calair, a German holiday flight company, who after a year or two of operating them went bankrupt. They were laid up at Basel in Switzerland when a supposedly South American aircraft dealer approached the liquidator with cash to buy the three aircraft and all the spares, and take them to Paraguay. US dollars were transferred, and three crews turned up late at night and ferried the aircraft off all together, flightplanned to Las Palmas, then Rio de Janeiro. They refuelled in the Canary Islands in the middle of the night, again for cash, and set off southwards over the Atlantic. They were never seen in South America (apparently the Brazilian Air Force started a search & rescue operation for them) but had flown at night across African territory definitely banned to them, arriving at Salisbury (now Harare) to hold down operations from there to South Africa for the next 10 years. It helped that South African Airways was a 707 operator.