Grünes Siebenec k

IMI KNOEBEL (B. 1940) Grünes Siebeneck signed and dated 'IMI 75 88' and stamped with number '65' (on the reverse) acrylic on wood 18 5/8 x 18 7/8 x 2 ¾in. (47.3 x 48 x 7cm.) Executed in 1975-1988, this work is number sixty-five from a series of one hundred and fifteen, each unique