this is a Grohe thermostatic bath / shower mixer. RRP over £200, originally a lot more, top quality make.
I got a refund because it was delivered damaged and so it is surplus to requirements as I have got a replacement.
It was sold as used working so I have no reason to think it may be faulty in any other way but have no guarantee.
there are scratches on the top surface and the undersurface. I have not tried to polish them out.
You will need to buy a replacement shower / bath diverter knob as that part is damaged beyond repair.

Collection from near train station between 11am and 7 pm, most days by arrangement.
Full address will only be given when an arrangement for collection has been agreed.

bath shower thermostatic mixer tap (Coventry CV1)