| Umbo Schattenwunder 1928 (taken) 1980 (print) Gelatin silver print 28 x 21 cm (35 x 28 cm) Bassenge Photography Auctions Courtesy of Bassenge, Berlin (Photography, Dec 2, 2009, Sale: 94, Lot: 4400) LL/33572 Signed by the photographer in white ink in lower right corner within the image; portfolio/copyright stamp, therein numbered 17/50 in ink and annotated in pencil on the verso. From the UMBO Portfolio. 10 Photographien 1927 - 1930, Galerie Rudolf Kicken, Cologne 1980.
Lit.: Herbert Molderings. Umbo - Otto Umbehr 1902-1980. Dusseldorf 1995, ill. Plate 53.
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