Set of 4 1950s chairs in chestnut wood and green skai

Set of 4 chairs from the 50s with a very sturdy chestnut wood frame and a seat covered in green skai, with a beautiful wave movement of the backrest. The frame of the chairs has no cracks or breaks, it is solid, but it shows some signs of woodworm. The superficial skai seat is still in good condition, the area under the seat is worn by time, there are still functional steel springs, but the straw and the padded layer under the seat need to be completely redone. They need restoration. This is a set of 4 seats, but 6 identical pieces are available if necessary.