Set SZ85 lounge chairs designed by Jan Pieter Berghoef for ‘t Spectrum in 1968. The base is made of wood with the original red stain. Both are reupholstered with new foam and black rib fabric. The high quality rib fabric is made from 100% organic cotton. Very rare set which was made only a very limited time. 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