Italian modern chairs lira or cab k5 by mario bellini per cassina, 1990s set of six chairs model lira, also known as cab k5, in black leather. The internal structure, composed of seat, rounded backrest and legs, is made of plastic and is entirely covered in leather. Between the seat and the backrest there is a decorative domed hole. produced by cassina in 1990s and designed by mario bellini in 1989. Logos present under the seat.  good condition, the leather has scattered signs of use. measurements in cm 53.5x54x77.5h and 44h seat. This piece has an attribution mark, i am sure that it is completely authentic and take full responsibility for any authenticity issues arising from misattribution