omega seamaster vs rolex oyster perpetual|rolex vs omega speedmaster They often use the same material or leather as the main body of the bag, or they use contrasting trim of untreated vachetta. Vachetta turns a deep honey color with age and the more durable coated leather may be used for items that would be subjected to more wear and tear.a. Vachetta Leather. Coated Leather. 101 Guide. Subscribe