Is it velvet?
Some custy's perception of a fabric can be totally wrong, so as Shaun said go and look at it. It could be Draylon, Viscose, Velveteen, mixed fibres, blah blah blah.
Is it really that old? Cleaning a very old piece may have little effect and could get damaged.
Why are you charging £45 to clean a suite?
Where are you based?