I don’t do them very often, but for special clients I make bespoke leather goods. Here’s a leather tool belt I made for a woodworker friend of mine.
I sent him some pieces of leather and he used the same brand that he uses to sign his woodworking projects to brand a mark in the leather.
I used hardware from a vintage scout belt.
And after six months, this is the same belt after it’s developed a patina from use.