Xram53,
Just to confuse us, it also looks like the the term "De Luxe Cab" in 1953-and-earlier was renamed "De Luxe Equipment" in 1954 (and "De Luxe Cab" is used for different items in 1954).
I have a 1951 product brochure that shows a three window cab with stainless window reveals as an example of a Deluxe Cab vehicle but states that the cab has rear corner windows. A different five window option is also shown as available on its own (1951). The is from a 48 page b/w sales pamphlet not a Data Book or Specifications Book/Manual.
In your 1954 restoration guide, is page 168 (part of the index) missing? Also, in the '54 restoration package, did you receive a November 1953 "Service News" (with info about 1954 trucks): with page 3 missing?
Thanks,
Tim