Albert Renger-Patzsch: Industrial Study. 1930's, Vintage silver print on lightly textured paper, 9 x 6-3/4 in. (230 x 172 mm), unmounted, with inkstamp "Renger-Foto D.W.B./ Essen Goethestr. 41" and "No. 92108" and another triangular stamp on reverse. w1896.