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Sculpture (in 3 parts) in plexiglass and aluminium, each signed Henri Gabriel, dated 1977 and numbered 1 to 3. Max H: 65 cm, W: 45 cm, D: 20 cm. Enclosed is a brochure "Henri Gabriel, optique et cinétique" published by Quadri Gallery in 1991. Texts by Emiel Bergen, Jean Coquelet, Jo Delahaut, Henri Gabriel, Frank Popper