These F7 A unit powered locomotive is painted dark gray with the SP red "Bloody Nose" paint scheme and lettered in white. The F7 B unit dummy locomotive is also painted dark gray and lettered in white. They were built in February of 1953. These units stayed with the SP for their entire working life. In 1959, SP standardized with a paint scheme of dark grey, white lettering and a red "winged" nose. This scheme was dubbed "Bloody Nose" by railfans. It was replaced in the mid 1980s by the "Kodachrome" paint scheme.