Yes Sir! I've seen this kind of pocket and I wanted to try. For sure there are other good ways to make pockets with nice style, I have to search for a better shape.
Having to hand sewing I tried to avoid difficult internal passages, not confortable with small volume pocket.
It should be cowhide (vacchetta in italian), 2mm +/-, slightly less than leather used for belt, not dyed. That's a new "scrap", about 2euro / foot. I never heard about this Neatsfoot Oil, I will made a search for this, it gives exactly the color I like to reproduce! I hope I will find in local shop, if not I will buy in internet, i don't want to ruin the final bag for a bad product
Question: is good to treat leather with grease or oils to keep it soft?