Here is my '51 short 1/2 ton flatbed. I don't know if it is factory or not but it sure looks good.

http://www.stovebolt.com/gallery/vandenberg_steve_1951_02.html

Here is my '52 short 1/2 ton with a utility box. This I know is aftermarket.

http://www.stovebolt.com/gallery/vandenberg_steve_1952.html