Including; ‘This is Tomorrow’, The Whitechapel Art Gallery, 1956, 50 x75cm excluding frame, Pieter Engles, Sky Event, signed in pencil lower right, numbered 95/190 lower left, 65 x99cm, Henry Tomaszewki, Stedelijk Museum Amsterdam, 1991; Cobra group 1948-1951, Lenbachhaus, Munich 1987; Constant Nieuwenhuys, ‘New Babylon’, Haags Gemeentemuseum, 1974, 72x93cm incl. frame; Roman Cieslewicz Exhibition, 1981, 68x98cm; Musée d'Art moderne de la Ville de Paris, 'Le Monde en question', 6 au 28 juin 1967, 42x57.5cm
