Steel tube chair (Gispen model 201) at Mrs. Sonneveld's desk, in the living room of Sonneveld House. This type is the armrest version of Gispen model 101. The chair has an upholstery of yellow fabric. The chair stands by the desk of the firm Thonet, type B91. House Sonneveld was completed in 1933 and was built for the Sonneveld family to a design by the architectural firm Brinkman and Van der Vlugt. They were also responsible for the interior, working closely with W.H. Gispen.