DESIGNED BY GERRIT RIETVELD IN 1923, MADE BY G. A. VAN DE GROENEKAN, PROBABLY 1960S

This chair is named after the design produced by Rietveld for the Dutch Pavilion at the Juryfreie Kunstschau exhibition in Berlin in 1923. It was Rietveld's first asymmetric design, and both left hand and right versions are known.
See: L'Architecture Vivante, Vol. 3, 1923.
Baroni, pp. 92/3, no. 16.
Kper and van Zijl, p. 92.
Vöge, p. 60, no. 53.