One of the very few prototypes ever made, definitely one of the rarest Rossin ever. Probably made in the late 80’s. Early composite material construction, performed by gluing together the two shells of the main triangle of the frame. A steel rear triangle is then integrated to the body. Designed to challenge in time trial competitions and breaking time records in velodromes, equipped with a pair of 700 and 650 disc wheels and an aero fairing in the front. The stem is directly welded to the fork crown, and the handlebar was made and installed to fit inside such fairing.  A bike rare enough to make it quite difficult in finding much more details about it.