César, Pair of Expansion Ashtrays, 1971, Bronze, large: 12.6 x 12.6 inches, 32 x 32 cm, small: 7.48 x 7.48 inches, 19 x 19 cm Edition 2 of 8, Edition of 8. Digital image copyright: © Christie's Images Limited (1996); Artwork copyright: © 2014 Artists Rights Society (ARS), New York / ADAGP, Paris.