SP Cotton Belt-SSW. The Southern Pacific Company gained Interstate Commerce Commission approval to control the Cotton Belt system on April 14, 1932 but continued to operate it as a separate company until 1992, when the SP consolidated the Cotton Belt's operations into the parent company. Cotton Belt diesel locomotives from 1959 on were painted in Southern Pacific's "bloody nose" scheme - dark gray locomotive body with a red "winged" nose. The letters "SSW" were painted on the nose and "Cotton Belt" on the sides.