The base design isn’t mine. I saw something similar on Pinterest and liked it, so I recreated it in Illustrator. I shared the SVG and Illustrator files in the Free Design forum for anyone who wants to give it a try.
5 oz oak veg tan, 6 different dyes (pictured) and 6 different metallic paints (not pictured…it was LATE last night ) along with antiqued copper hardware, and hand saddle stitched using Ritza Tiger Thread. Edges burnished on the Cobra MP with water first, then dyed with black Fiebings pro dye and a coating of beeswax before the 2nd and final burnish.
1/16th" (.0625) diagonal cuts for the stitching holes, pattern reversed on the backside so they line up properly. I still had to take a single pronged stitching chisel and open the holes just a tad so my needles would go through easily enough. Increasing the line thickness in the design might be easier.
After dye, but before painting.