Set of 4 chairs in black leather 70s vintage

Set of 4 matteo grassi style chairs from the 70s. Tubular metal structure. Black leather upholstery. Discrete conditions, presents different signs of time and use. 70s design. design date 1970 – 1979. Country of production italy. Vintage style. Discrete conditions status. Restoration and detailed conditions present signs of time on the metal structure and cladding, as in the photo. Material leather, metal. Chair width 50 cm. Chair depth 57 cm. Chair height 86 cm. Seat depth 37 cm. Seat height 44, 5 cm.