Post-Modern yellow and black adjustable office chair by Bieffeplast Italy 1980

Adjustable yellow and black post-modern adjustable office chai produced by Bieffeplast Italy in 1980. The chair is in great condition as can be seen in the images.
Measurements : Seating height high 22.83" - Seating height low 17.71" - Height 29.52" - Depth 25.19" - W 19.68"