The XJ220 is something so rare that I don't even recall having seen one in person yet. Having not seen one with a vivid memory of it intact, along with the high costs of securing one, it might as well be an urban myth!
The Dufour Sonnerie and Duality on the other hand, I can fathom. Having seen a Duality, one of only nine in the world IIRC, on the wrist of a special individual, I can confirm that I have first-hand knowledge that they do exist! Admittedly, when I first saw the Duality, the first Dufour I had ever seen, I was intrigued; it differed from the Journe Resonance and it had the most beautiful movement finishing I had ever seen. I also wasn't that familiar with the Dufour and didn't really know it was that special. To this date it is still "the fattest and most beautifully polished bullnosed" anglage I've ever seen...
Thank you for the advice on the SLS!
And a beautiful Jaguar. Very sleek. And an incredible work of art that still looks stunning today!