Hello Everyone,I have acquired a rocking chair from a friend which I intend to reupholster. I wonder if anyone could identify its origins, The chair has four suspension springs between the base frame and the base in addition to the torsion springs on both sides, and it has large rubber stops on the rear rails with felt pads on the bottom of the rocker frame. I have attached some photos, my friends confirms that it is over seventy years old, I have looked on the internet and can not find the same design with the suspension springs, Is it possible it is a one off made to someone's requirements or is it a type of chair produced in quantity. I will be pleased to find out more information on my chair