This model is known as RAR ((R)ocking (A)rm chair on (R)od base).  It is an iconic 1950s design by the Eames duo and is a great example of an original fibreglass black shell version. It is upholstered in a brown vinyl with a contrasting camel coloured hopsack seat, sitting on a black oxide frame with walnut runners.  Has been given a B condition rating due to some inevitable marks to the upholstery.