Victor Vasarely
GD-1, from Series 80; Untitled (Three Spheres) 2 1964; c. 1975
Screenprints in colors on wove paper
17 1/2 x 16 1/2in (44.5 x 42cm) 24 1/4 x 14in (61.8 x 35.6cm)sheet 27 1/2 x 19 3/4in (70 x 50.2cm) 31 1/2 x 20 1/4in (77.5 x 51.5cm)
Signed, 65/80 and 94/150 respectively