Walter STRACK (1936-2021) Abstract composition in shades of red and blue. Oil on canvas signed and dated 1961 on the back. Height. 143 cm - Width 110 cm Walter STRACK is a French-Swiss painter and sculptor. He is one of the representatives of the so-called "concrete art" theorized in 1930 by Théo VAN DOESBOURG, whose works are based on abstract tendencies.