That picture of my '52 GMC 450 COE, was taken back in the late 60's, in Lebanon, Indiana. I didn't get the trailer, when I purchased my truck. I believe that trailer, was a 32 ft. Fruehauf, or Dorsey, drop deck. See it here,
http://www.classiccoe.com/friends/spanky/1952_spanky_1t.jpg
