Ignazia Favata, Joe Colombo Designer 1930-1971, Milan, 1988, p. 47 for a similar example Mateo Kries, Joe Colombo Inventing the future, Weil am Rhein, 2005, p. 143, fig. 81 for a similar example
circa 1976 Leather, chromium-plated metal, painted metal. 114 x 83.7 x 81.5 cm (44 7/8 x 32 7/8 x 32 1/8 in.) Manufactured by Sormani, Italy. Together with certificate of authenticity from Sormani.