Original black and white painted metal, flexible chromed neck. Manufacturer's stamps.
Literature;
T. Kellein, 'Alvar & Aino Aalto, Design collection Bischofberger', Editions Hatje Cantz, Ostfildern-Ruit, 2004.
Charlotte and Peter Fiell, '1000 Lights, Vol. 1: 1879 to 1959', Cologne, 2005, p. 492
Ref: 8486