ETTORE SOTTSASS Unique Biedermeier sofa, 1982 Plastic laminate-covered wood, painted tubular metal, fabric. 47 1/2 x 85 3/4 x 23 3/4 in. (120.7 x 217.8 x 60.3 cm) Underside signed in pencil PROTOTIPO Together with a copy of the certificate of authenticity from Ettore Sottsass. ESTIMATE $50,000-70,000 Via Phillips de Pury & Company: