| Rudolf Auer Schönheit der Technik (the Beauty of Technology) 1966 Gelatin silver print, ferrotyped 40 x 31 cm Bassenge Photography Auctions Courtesy of Bassenge, Berlin (Photography, Dec 2, 2009, Sale: 94, Lot: 4110) LL/33515 Signed, titled and annotated by the photographer in ball-point pen on the verso.
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