Chair model “Swing” by G.J. van Os, Culemborg. The design is from 1949 and the chairs were produced up to approx. 1959.
Height seating: 47 cm
Depth seating: 42 cm
Width back: 42 cm
Height back: 87 cm
The upholstery looks a bit different than it is. See the last photo for a realistic picture of it.