This Vintage Industrial Architect Or Drawing Desk Chair Was Designed by Friso Kramer and Manufactured by Ahrend De Cirkel. the Chair Features A Steel Frame With An Adjustable Newly Upholstered In Black Leatherette, Plywood Seat and Back. the Height Is Adjustable Between 51 - 62 Cm 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