The Gewerbefoerderungsstelle (industry promotion office) of the Berlin Chamber of Crafts organized an aluminum course together with the Aluminiumzentrale in Berlin. At the end is held a guided tour of the exhibition of the Aluminiumzentrale, where are shown the possible uses of "German" materials, here in the picture a bike (Anker Sichelrad) that weighs only 9 kg. All the accessories are made of light metal.