Knitting Chair
Found this photo of the Knitting Chair by J.J.P. Oud in Wikimedia The photo seems from a certain Oscar.
Then I found a second one at the site of Museum Boijmans van Beuningen who have one in their collection as well.
And after publication of this post the algoritm of the similar posts below this post pointed me to a Cool Oud chair in New Zealand which is also a Knitting Chair.
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Chairs!
gje