Set of six vintage dining chairs

Lovely set of four dining chairs with lovely backrests and wood. 
 
The chairs are from an unkown manufacturer but absolutly lovely! They were probably made in the 1960's in Belgium. The seats have been reupholstred. 
 
Sidenote: seating is wood. 
 
Measurements: 
Width: 47,5cm
Depth: 43cm
Height: 78,5cm
Seating Height: 45cm