Troy Flanders of Flanders Forge uses an old technique of leather stacking on knife handles. He says, “Leather stacking was popular in the early 1900's probably derived from using the leftover leather from the sheath. I use it on hunting and camp knives, it gives a nice classic look, and when the knife is used on a cold day, the handle feels warm”.
Troy says, "There's no secret on how to make leather stacked handles; it is fairly straightforward". Here is how he does it.