Found this chair by Nanna Ditzel at the Danish Design Museum in Copenhagen and combined the photo with some videos of the grand lady regarding her design ideas:
Found this wooden chair with wool upholstery by Nanna and Joergen Ditzel at the 1stdibs site where the Dealer Post Modern accidentally calls Nanna Nina….. €1.942,47 seems a very reasonable price, but it is a brand new reproduction by Danish manufacturer Getama
Was sold at Wright for $ 25,000 in a 2013 auction. The estimate was $5,000–7,000. Funny enough a similar (or the same?) chair was upheld at a 2014 Phillips auction….
Prototype Dining Chair by Nanna Ditzel
This prototype dining chair will be on auction at Phillips in London on April 29, 2014. Estimated between £5,000 – 7,000. It was upheld.