This system of bookshelves was designed by Breuer in 1930 or 1931. It was first produced in Switzerland and sold after 1933 in the Zurich and Basel furniture shops founded by the
architectural historian Sigfried Gideon along with Werner Moser and Rudolf Graber. The
original production ceased in the late 1930's. Bookcase with frame in chrome-plated tubular steel. Adjustable shelves in black embossed painted MDF or matt lacquered in different colours.