Very interesting. I think Sudan Airways is still operating them. Might be the only operator in Africa. I dont fly in Africa but don't most airports have noise restrictions on them? The 707 was a thunderous beast in its days as one of the pioneers of commercial jets. The last time I spotted one was a few years ago as a US stratotanker. I've also seen, on TV albeit, ex Airforce 1.
Anyone holding a type on 707 is a real aviator. I can only imagine what flying it would be like with the five million round dial instruments.