This chair is probably 1930's, 1940's vintage and known as a radio chair. All four legs have ceramic castors and the chair bounces up and down similar to a rocking chair when you sit on it.
It's a great little chair that suits a short person like me as most armchairs leave my legs swinging in the air like a little child.
I was going to try re-upholstering it myself but then I looked at the springs and webbing and ticking and thought, nup, off you go to the professionals.
Here she is, all in her new glory