Bridget Riley, Echo 1998 Screenprint in colours on wove paper Hand signed, titled and numbered by the artist in pencil. This work is number 50 from an edition of 75. 50/75 Framed in off-white, with an off-white window mount and UV99 glass. 31 3/10 × 32 3/10 in | 79.5 × 82 cm with frame included Published by Artisan editions, Hove Signed by Maker