Chicago, Burlington & Quincy Railroad EMD FT cab Unit diesel locomotives. Used 1940's through the 1960's., a photo by Eddie from Chicago on Flickr.
One of the more popular American diesel locomotive color schemes from the 1950's era, was the light gray (Almost white.) color scheme used on the EMD model FT, F3 and F 7 EMD cab unit freight service diesel locomotives used by the former Chicago, Burlington & Quincy Railroad.
This color scheme was a daily sight heading up some of the Burlington's early diesel powered mainline freight trains through out the 1950's and 60's era.