Schattenwunder. 1928. Gelatin silver print, printed ca. 1975. 28 x 20,5 cm (sheet 35,2 x 27,8 cm). Signed by the photographer in white ink in the lower right corner; portfolio/copyright stamp, therein numbered "32/50" in ink on the verso. From the UMBO Portfolio: 10 Photographien 1927-1930, Galerie Rudolf Kicken, Cologne, 1980.

Herbert Molderings. Umbo: Otto Umbehr 1902-1980. Düsseldorf: Richter 1995, ill. plate 53.