The leather goods business of King Ranch originated in those chaotic years following the Civil War. During the War, the Ranch was raided and looted by Union troops. When the hostilities were finally over, Captain King re-established with the forethought that ranching in South Texas demanded not only good men, horses, and cattle, but also outstanding gear. He needed saddles that were durable, yet lightweight, comfortable to ride, yet easy on the horses' backs. Unsuccessful in finding saddles of this quality, he hired experienced craftsmen who could make them and soon began operating his own saddlery.

The fame of King Ranch custom saddles and durable leather goods, which carried the Running W brand, quickly spread throughout the Southwest and brought with it the need to fill orders for outside customers.