Bernd & Hilla Becher (b. 1931 and b. 1934)

Bernd & Hilla Becher (b. 1931 and b. 1934)
Spherical Gastanks
signed, titled and dated 'SPHERICAL GASTANKS Bernd and Hilla Becher (on the reverse of the first photograph) and numbered consecutively (1-9) (on the reverse of each)
nine gelatin silver prints mounted on paper
each: 16 x 12¼ in. (40.6 x 31 cm.)
overall: 67½ x 54 in. (171.5 x 137.1 cm.)
Executed in 1998. (9)