Diesis sofa, designed by Antonio Citterio and Paolo Nava for B&B Italia, Italy in 1979. The epitome of innovative research and sophisticated handcrafting skills, it has become a landmark in the history of design. This is the desirable and rare long three-seat version with down filled cushions. Executed in polished aluminum with black leather arms and back. Literature: Repertorio del Design Italiano, page 260.