Set of 4 Østergaard dining room chairs

Set of 4 Østergaard dining room chairs, model no. 58, with new upholstery. Danish modern design from the Mid Century. Harry Østergaard designed these chairs, made of rosewood, in the 60’s for Randers Møbelfabrik.
The frames are numbered. No further mark.
Some traces of use and restoration but furthermore in a good vintage condition.