Promotional model of an Oranier continuous furnace, Entw. Walter Gropius around 1931, for Frank's ironworks, Dillenburg, cast iron dark blue enamelled, numbered 1376, functionless, enamelling punctually cut off, beautiful collectible condition, 35x15x20 cm; See Lit. Fuchs/Burkardt: Product Form History, 1988, Fig. 202; Walter Gropius (1883-1969) was a member of the German Werkbund and founded the Staatliche Bauhaus in 1919. The collaboration with Frank's ironworks was created by Gropius Mrs. Ilse, who came from the Frank family of owners.