Not only was "Nairobi Embakasi" capable of servicing jets But....
several Major Airlines had regular jet service to there.
Air India (707), Alitalia (DC-8),East African Airways(Comet 4), BOAC (707 and Comet 4) and South African Airways (707)
The one thing you didn't count on is that there are people that document airliners like trains even noting the registration numbers, aircraft serial numbers and routes throughout an aircraft's career.
It was a sucker bet, had you been paying attention to your own thread you might have noticed that I had already proved you wrong.
East African Airways Jets flew from Nairobi to London with BOAC crews