And I would like to add the Inter DCO's, a classic design style, no square box and first tilt cab and proto - type originally designed by the Murty Bros for Diamond T.
Each of the 3 cabs - day cab, mid cab and full sleeper all classics.
Also note the door design with the longer vent windows, Kenworth introduced these door styles with longer vent windows in the 80's, 25 years after the DCO cab mid 50's, and other truck manufacturers also introduced similar designs