Auction information for the chosen item by Bridget Riley

Artist	Bridget Riley (1931 - 1984) England
Title	Basic Study, May 27 (bassacs)
Medium	Gouache and pencil on paper
Size (H x W x D)	26 x 25.2 in / 66 x 63.9 cm
Signed	No
Stamped	No
Inscribed	No
Dating	N/A
Lot number	106
Auction time	28 February 2008
Auction house	Sothebys – United Kingdom: London, Bond Street
Estimated price	20,000 - 30,000 GBP
Auction result	34,100 GBP ≈ 37,793 EUR \| 55,874 USD
With premium	Yes
Edition	N/A
Foundry	N/A
Impression	N/A