This is the original run of the Williams, I got them back in 2019. I believe the leather at the time was called "black domane" but it was essentially the same to black cxl. It's a 6oz dress leather that polishes nicely. For those interested these boots cost me $425 before shipping.
Still have the original sole on them because I dont wear them quite as often anymore and it's a very hard wearing boot that has stood up to time really well.