70's pedrali designer chairs

Set of 5 chairs signed pedrali, italian manufacture, 70s design. The structure is a varnished aluminum-effect steel tube. Stackable chair with polycarbonate shell. 2 red, 2 orange, 1 yellow. Good general condition, however there are a few superficial scratches on some seats (impossible to take a photo) and a small lack of paint on one of the legs.