6 wooden vintage chairs dark wood rush

Set of 6 dark wood chairs with rush backs and seats. They resemble versions by Martin Visser for Spectrum and Cees Braakman with the Japanese series for Pastoe. But slightly different. One of the differences is the higher back, which offers more comfort. They are heavy chairs, and I believe the wood is oak. The chairs are still in good condition. Both the woodwork and the rush backs and seats are missing a piece of rush, see detailed photo. The entire set has been cleaned, and loose joints have been reglued. The woodwork has been completely re-oiled. W 49. D 54. H 80. Seat height 46 cm.