Polyprop stacking chairs by Robin Day for Tecno, Italy 1960s

Set of 3 stackable chairs designed by robin day for hille. Produced by tecno milano, italy in the 1960s. They have a one piece seat and back made from polypropylene on a black tubular steel frame. They have age and use consistent marks like scuffs and paintloss. Structurally still in very good condition. This design icon was one of the first chairs designed using polypropylene and was revolutionary in its time, H X w X d = 74 X 55 X 50 cm. The seat height is 44 cm and the seat depth is 37 cm.