Abstract: A specially engineered, low protrusion, visually symmetric small footprint system of mounting advertising displays to vehicles, such as trucks, tractor trailers, and vans, providing upward/downward adjustability, ease of frame removal and remounting, and over-center tensioning by means of specially designed rails which are attached to the surface of the vehicle. The rails are reversibly fastened to the surface of the vehicle, and can be easily and repeatedly removed and refastened in a short time. This is effected by sinking threaded screw seats into the wall on which the sign frame is mounted, providing permanent holes into which can be repeatedly screwed into and unscrewed from, the low protrusion screws which hold the sign frame to the wall. The hardware residue, after removal of the frame, is barely visible, with a very small footprint, being simply the protruding rims of the threaded screw seats.