Art et Industrie, New York
Rick Kaufmann, New York
Acquired from the above by the present owner, 2002
Kazuko Sato, Alchimia: Never-Ending Italian Design, Tokyo, 1985, p. 17 for a drawing
Hans Höger, Ettore Sottsass, jun.: Designer, Artist, Architect, Berlin, 1993, p. 94
Ronald T. Labaco, Ettore Sottsass: Architect and Designer, exh. cat., Los Angeles County Museum of Art, Los Angeles, 2006, p. 123
Peter Weiß, Ettore Sottsass: Bau.Haus I, II, Bönen, 2009, pp. 12, 58 for drawings and p. 59