Hi
I believe this was original equipment on quite a few Jaguars.
https://www.longstonetyres.co.uk/catalog/product/view/id/1970/s/225-65wr...
Pirelli have just made them. there is a container on the way to the States with some in and they will be at http://www.lucasclassictires.com/Pirelli-Cinturato_c54.htm
Dougal
Longstone Tyres