Composition grise, verte et bleue. 1966. Lithograph in colors. Poliakoff/Schneider 54. Signed and numbered. From an edition of 150 copies. On wove paper by BFK Rives (with truncated watermark). 48,4 x 62,7 cm (19 x 24,6 in). Sheet: 60 x 75,8 cm (24,6 x 31,2 in). Printed by Erker-Presse, St. Gallen (with blindstamp). Published by Kunstverein St. Gallen. [SM].