RARE EXAMPLE OF CALIPH MODEL ARMCHAIR wooden frame, cushion and mattress covered in fabric in blue and yellow Poltronova production, Agliana, circa 1965 Bibliography for comparison I. Mietton, Sottsass, Poltronova 1958-1974, Skira, Paris, 2021, p.92-93 H. Hoger, Ettore Sottsass jun. Designer Artist Architect, Ernst Wasmuth Verlag, Tubingen/Berlin, 1993, p. 79 G. Sambonet, Ettore Sottsass: furniture and some decor, Arnoldo Mondadori, Philippe Daverio, Milan, 1985, p. 25 P. C. Santini, Making furniture with, Poltronova Edizioni, Florence, 1977, p. 88 G. Gramigna, Repertorio 1950-1980, Mondadori, Milan, 1985, p. 203 Domus 426, 05/1965, p. 55