COLOGNE.- Van Ham celebrate their 10th anniversary with over 400 works by outstanding photographers, among them regulars such as August Sander, Albert Renger-Patzsch, Bernd and Hilla Becher, Andreas Gursky or Irving Penn. Moreover, Van Ham dedicate a special catalogue to an American collection entitled Selection from an American Collection that comprises numerous works by international top photographers. At this occasion Van Ham again calls top lots from the highly sought-after oeuvre by Cologne photographer August Sander to auction. Particularly remarkable is the 1926 portrait of Sander’s friend, the author and literary critic Dettmar Heinrich Sarnetzki, that the photographer included in his book “Antlitz der Zeit” in 1929 (lot 1123 | estimate: