Swiss manufacturer Lehni, working with Swiss artist and designer Andreas Christen, developed the Aluminium Shelf for the Swiss National Exhibition Expo 64 in Lausanne. The bookcase was the first furniture piece created by Lehni, originally a Swiss-based plumbing workshop and metalworker established in 1922. The Aluminium Shelf was conceived as a modular shelving system manufactured in either bare or anodised aluminium, employing the techniques of punching, bending and folding and utilising screws instead of welds. The system includes accessories such as drawers, sliding doors and pull-out shelves. Photo Lehni. Lehni