Please note: This material for blender 2.8x only. In cannot be used in 2.79. 

Procedural old leather material.

This material is extremely easy to use and customizable.

With different settings, you can get a lot of material variations. 

Examples of using 

(Demo models not included)

Just append material to your scene, assign it to mesh and move sliders until you get needed result!

It may work fine without UV in some cases, but using UV is recommended.

Preview images rendered in Cycles with hdri (not included).

Use it and get amazing results!