Auction information for the chosen item by Bridget Riley

Artist	Bridget Riley (1931 - 1984) England
Title	Untitled
Medium	Pencil and gouache on paper
Size (H x W x D)	28.9 x 23.7 in / 73.3 x 60.2 cm
Signed	Yes
Stamped	No
Inscribed	No
Dating	N/A
Lot number	146
Auction time	26 June 2009
Auction house	Sothebys – United Kingdom: London
Estimated price	12,000 - 18,000 GBP
Auction result	15,000 GBP ≈ 16,624 EUR \| 24,578 USD
With premium	Yes
Edition	N/A
Foundry	N/A
Impression	N/A