Grünviereck

Kurt Schwitters (1887-1948) Grünviereck incised with initials and dated 'KS 21' (lower left); signed and inscribed 'K.Schwitters 1921.M5' (on the reverse) oil on glass with paper, glass, fabric and cotton wool assemblage 6 1/8 x 5 3/4 in. (15.6 x 14.5 cm.) Executed in 1921