This is an iconic armchair designed by Andrea Branzi for Cassina of Italy and dating to the late 20th century, Circa 1993 
The chair has a reverse ribbon design and is called "Revers"
It is made with a matt anodized steel frame with a green molded wood back support and arm structure in the form of reverse ribbon.
 
DIMENSIONS
Depth *
19 in
Width *
26 in
Height *
29.5 in
Seat Height
17.75 in