Second Hand Wilkahn Graph Chair This Second Hand Wilkahn Graph Chair is an executive style chair with smooth black leather upholstery. Available for next working day delivery, this black leather executive chair comes in good condition, for a reduced price. SKU: shse8991ol Good condition Black leather upholstery Fixed polished arms Polished 5 star base FREE installation For more info on this chair please contact our Old Street showroom Available for next working day delivery when ordered by 2pm (click here for full details) Need more choice? Call us on 0800 559 3917, or visit our showrooms in London, Essex, or Northampton, for additional options, prices, and availability.