Lot of 4 vintage school chairs Galvanitas S16 Netherlands

Set of 4 vintage school chairs galvanitas s16. It is a very popular model and it is becoming more and more difficult to obtain. The seats fit together very well. The frame of the chairs is grey/cream. Chairs show normal signs of wear, see photos. A chair has a superficial crack in the seat, this has no consequences. Approximate dimensions: width 40 cm, depth 48 cm, height 80 cm, seat height 45 cm.