em. Prof. ir. Architect Wim van den Bergh (1955) model: 'Mono Tube Chair' period: 1981 origin: The Netherlands dimensions (cm): h72 x w48,5 x d52 cm (sh 46,5 / ar72 cm) dimensions (inch): h28,35 x w19,09 x d20,47 in (sh 18,31 / ar28,35 in) material: leather, metal Acquired directly from the designer. I have official proof of authenticity such as vintage catalogs, designer records, or other literature sources and take full responsibility for any authenticity issues arising from misattribution