This is a Two-Seat Sling Sofa, designed by Bruce Hannah and Andrew Morrison for Knoll in 1971. It features a polished cast-steel frame, and has an upholstered seat & back. The upholstery is presently done in a brown striped material.

This sofa measures 36 inches deep, 55 inches wide, and 35.75 inches high. It has a seat height of 16.5 inches.
The current material is worn and stained. New upholstery is recommended. The frame is strong and the foam is in good shape. There is some patina evident on base. Overall, this piece is in solid condition but in need of new upholstery. Please see photos.