The Olson Rug Co. of Chicago, which is still in business today after having being started in 1874, was showing off its first streamliner delivery truck in this photo. The design took its styling cues from the famous Burlington Routes stainless steel Zephyr. If you enjoy streamliners, visit the Denver Public Library were they have a nice collection of photos.
Not much is known about the trucks, who built them or what brand of chassis they are on but they certainly must have gotten Olson a lot of attention. The press photo is dated June 22, 1935. The Old Motor photo.