Vintage black leather rocking chair by Peter Opsvik for Stokke 1980s NorwayVintage black leather rocking chair by Peter Opsvik for Stokke 1980s Norway The pendulum rocking chair was designed by Peter Opsvik in 1983 with a strong focus on product design as a means of solving real life problems. This chair combines back support and dynamic movement in equal measure. When working, the spine remains in an upright, dynamic position and the body is in balance. This subtle activity strengthens your core muscles and prevents tension