W. Mauke & Sons; Georg Koppmann; Hamburg. Floating customs houses on Brookthorquai from the Hamburg portfolio. From the free port area; photographed and published by G. Koppmann & Comp; Staatliche Landesbildstelle Hamburg; collection on the history of photography; paper; collotype; image size: height: 22.1 cm; printed on the backing board: Hamburg. Floating customs houses at Brookthorquai; Photography by G. Koppmann & Comp; Hamburg. Photographed Hamburg; November 1888; architectural photography; city; city view (veduta); port; warehouse (harbor)