This high-quality model 'Jet' modular wall shelf was designed by a pioneer of furniture design in the early 1970s. For the first time Ernest Igl used Polyurethane for his designs, manufactured by Wilhelm Wrendl. It was a totally new material at the time. He also used Polyurethane for the famous 'Jet' desk. This very rare piece is an authentic original of modern design history. I have official proof of authenticity such as vintage catalogs, designer records, or other literature sources and take full responsibility for any authenticity issues arising from misattribution