28 
of 30
28 
of 30
Bridget Riley
Coloured Greys [2]  1972
Screenprint
56.9 × 57.2 cm  |  22 3/8 × 22 1/2 in (image)
72.6 × 73.4 cm  |  28 5/8 × 28 7/8 in (sheet)
Edition of 125 plus 10APs