Sol LeWitt
Bands of Color in Four Directions and All Combinations, 1971
etchings in colors, on Rives BFK paper
Image: 12 3/4 x 12 3/4 in. (323 x 323 mm.)Each Sheet: 21 1/4 x 21 1/4 in. (539 x 539 mm.)
Signed, 10/25 (there were also seven artist's proof sets lettered A-G)