1 of 6 Orginal Matteo Grassi visitor chair in gray leather 1970s1 of 6 Orginal Matteo Grassi visitor chair in gray leather 1970s gray Leather Model Visitor Desk by Mart Stam & Marcel Breuer for Matteo Grassi, 1970s Bauhaus chair designed by Mart Stam for Matteo Grassi in the 1970s. Original gray and chrome leather seats. Model: MG5 Visito chair Material: gray leather chrome tubular metal black Seat height 45 Condition: Very good. Signs of wear related to age and use. Some scratches. chrome excellent. Dimensions