Set of Four Eero Saarinen Executive Armchairs Knoll Kvadrat Hallingdal 1971

Set of Four Eero Saarinen Executive Armchairs for Knoll, manufactured by Wohnbedarf Switzerland in 1971.
 
The chairs were professionally reupholstered with new foam and covered with a Kvadrat Hallingdal 65 fabric, designed by Nanna Ditzel in 1965.