The Walter Knoll Big Blue corner sofa is a true champion of spaciousness and architectural clarity. Upholstered in an elegant, mottled gray, this sofa embodies the "Spirit of Modern Living"—it is large, inviting, and yet impressively disciplined in its design. We are particularly fascinated by the balance between the solid, cubic upholstery elements and the delicate lines of the back cushions. The Big Blue model is designed to create a focal point of tranquility in the room without appearing bulky. Walter Knoll is known for its hidden comfort features. In this model, the manual function refers to the armrest, which can be folded down completely to extend the seating area. Thanks to the premium fabric quality and masterful upholstery by Walter Knoll, this corner sofa offers seating comfort that will retain its shape for many years to come. I have official proof of authenticity such as vintage catalogs, designer records, or other literature sources and take full responsibility for any authenticity issues arising from misattribution