Martin Visser Sofa for 't Spectrum 1965

Very rare sofa designed by martin visser in 1965 for 't spectrum. Most likely this sofa is only made in very small numbers. I cannot find it online and it is not included in the spectrum catalogue. The matching lounge chair, model sz12, is depicted in the catalogue. This chair was in production for only a few years. The sofa has a nicely shaped black metal frame and it is upholstered with a beautiful pistachio green melange fabric by de ploeg. High quality made and heavy sofa. Very comfortable seating. The sofa is in good original condition. Just some normal traces of use. The fabric is still good, no damages.