From 1959 onwards, with Robert Lebels monograph, the Stieglitz’ photograph starts to be reproduced on a regularly basis. In 1963, I believe with­out asking Du­champ for permission, Ulf Linde bought a used uri­nal from a restaurant in Stockholm for the Du­champ ex­hi­bition at Galerie Burén in 1963, placed it, and sign­ed it in accordance with the Stieglitz photo­graph.