1951Chevy1Ton,

You are correct about different fender colors be relatively uncommon on A-D trucks. My statement above was incorrect. I should have stated that it was completely possible for fenders to have been ordered with a different color from the body (special ordered, not a Regular Production Option).

My guess is that companies/municipalities/organizations liked to have matching colored trucks. Prior to 1940, the fenders were a different color from the body (most often the standard black fenders?). Trucks were used for many years, so companies might have wanted to buy newer model/series trucks to match their other/older trucks.

http://www.stovebolt.com/gallery/haist_whitney_1939.htm
http://www.stovebolt.com/gallery/davis_brian_several.html
http://www.stovebolt.com/gallery/long_gary_1947.html
http://www.stovebolt.com/gallery/stefanovsky_luke_1948.pdf