3-position scalable chair, 70s

Evolutionary chair of the 70s, in light wood and white formica, in the style of marcel gascoin's 3-position stool (low seat, high seat and stool/table) or in the style of hans von klier's 1960s seat (last photo). Note, there are small holes on the mount and 1 on the seat, maybe there was a tablet. Mounting all in mortaises. Original chair evolving with the child's age. Dimensions: low seat 16.5 cm // high seat 23 cm // width 36 cm // height stool/table 36 cm.