Steering Wheel

I haven't measured it, but I did put them on top of each other and the Jag wheel wheel is only about an inch smaller OD than the OE '65 Valiant manual wheel that it replaced.
I didn't know what it came from until a friend posted a link to a "Cars for Causes" ebay auction for an XJ6 and it had both the wheel and the strange adapter that mine also came with. Because of this I'm suspecting that that it might be an OE fitment and that more can be found in the junk-yards. However the first 1/2 dozen cars that I just checked on ebay didn't have it. I'm sure that an adapter could be sourced, it was just easier for me to make it.