Set of 6 old bistro chairs including 5 with cannage and 1 wooden top

Set of 6 old bistro chairs. There are 5 with cannage and 1 with wood top. The history of these chairs: bought in 1970 by my mother in an auction of an old bistro, following the death of the boss who was over 80 years old so the chairs must date from the 1920s / 1930s In good condition. Some screws were handed over by my father. The cannage had been redone. The seat height is 45 cm. The seat is 38 cm deep. The widest of the seat (front) is 36 cm. Weight 3.3 kg approximately the chair. Total weight of the 6 chairs about 20 kg. They are comfortable.