This shelf, called 'Utrecht' is a design by Constant Nieuwenhuys. Nieuwenhuys was a member of the CoBrA movement. He is known as a fine artist, musician, writer and he was also known for his visionary architectural work, known as 'New Babylon'. Nieuwenhuys has made a few designs for interior items for the company of 't Spectrum. His most famous work is the 'IJhorst' coffee table. The book on 'T Spectrum, by 010 publishers, also shows another design of Nieuwenhuys, being this wall rack. This was made in a few different colors. Very rare and true collectors items or even more so, museum piece.