Letizia Ponti, Milan, gifted directly by the artist, 1957
Acquired from the above by the present owner
Fernanda Pivano, 'Ettore Sottsass: Ceramiche dal 1955 al 1970', Domus, no. 749, May 1993, p. 69 for similar examples
Fulvio Ferrari, Ettore Sottsass: Tutta la Ceramica, Turin, 1996, p. 46 for similar examples
Fulvio Ferrari, Sottsass: 1000 Ceramics, Turin, 2017, p. 34 for similar examples