Vintage sofa "gradual lounge" is an original design item realized it italy in 1970s. Top rare sofa, designed by cini boeri for knowll gavina. A totally innovative modular system, which soon became iconic in 1970s and 1980s, and it is now considered a classic masterpiece of industrial design. Dimensions l 230 x 60 x 130 cm. / p 93 cm. / h 75 cm. Ref. Domus 505, dicembre 1971, p. 25-26 collect this vintage furniture! this piece is attributed to the mentioned designer/maker. It has no attribution mark and no official proof of authenticity, however it is well documented in design history. I take full responsibility for any authenticity issues arising from misattribution