Trade and art exhibition. ==References== 12 OPhotographs mounted on strong cardboard. 16.5 x 11cm. Lots in gold and black imprinted OLeinenbook 8 (dirted). Photographic institution of G. Overbeck (W. Otto), Düsseldorf, Schadow-Strasse 42. Düsseldorf, 1880. The photos show the stand of Haniel & Lueg, the exteriors and buildings (8), interior views of the mechanical engineering exhibition (2) and a large cannon. Kartons verso with references to the Photographisches Anstalt, which at the time was led by Wilhelm Otto (see Düsseldorfer Adressbuch d. Zt.). – Photos partly faded more.