Material study by Walter Tralau from the pre-course by Josef Albers II [Authorship uncertain]
Materialstudie von Walter Tralau aus dem Vorkurs bei Josef Albers II [Urheberschaft unklar]
Repro: 1. art-archives.net
1926, in Dessau
1. Private collection, vintage, gelatin silver print, 108 x 79 mm. Verso inscr.: Vorkursarbeit [aus der Klasse von Josef Albers. Hersteller unbekannt], and Inv. Nr.
2. The J. Paul Getty Museum, Los Angeles, Inv. Nr.: 85.XP.260.183, gelatin silver print, 112 x 85 mm. Verso inscr.: Tralau, 7, 156, and Inv. Nr.
Copy prints known:
I. Private collection, later print, Kodak paper, 254 x 203 mm. Verso inscr.: 85.XP.260.183, FEININGER, T. LUX
The authorship of this photo is uncertain.
The Getty Museum lists their copy as being by T. Lux Feininger. TLF writes in his letter dated April 28, 1990: "Author uncertain."]
TLF: "Author uncertain. A metal construction by an unidentified person; the same structure appears on No. 260.189**". 
[**The artist refers to the photo: 'Material study by Walter Tralau from the pre-course by Josef Albers I', which in his letter from April 28, 1990 he clearly declares as: "Not by me". The quality of the prints of both motives is similar.
The Getty titles the work as: 'Material study in paper...', TLF writes: 'A metal construction...']