Acquired in Italy circa 1970
“Due Nuove Macchine per Scrivere,” Domus, no. 475, June 1969, pp. 35-37
Emilio Ambasz, ed., Italy: The New Domestic Landscape, exh. cat., The Museum of Modern Art, New York, 1972, p. 75
Barbara Radice, Ettore Sottsass: A Critical Biography, London, 1993, pp. 86-89