m1ti
43
Sure about info
Top side is Barenia from Haas tannery. My wife was brave to get a Barenia Birkin because it patinas unlike Epsom or Togo but it's just classic imo.
I also tapered the strap quite a bit to make the watch feels less of a hunk. Starts at 3.75mm to 2mm.
Underside is Zermatt also from Haas. I just copied Hermes lining choice. Resists sweat stains a lot more than OEM lining. It feels a lot more pleasant on your skin and smells very little because it has hypoallergenic treatment. This is biggest difference for me.
Picture of the underside: