Auction information for the chosen item by Bridget Riley

Artist	Bridget Riley (1931 - 1984) England
Title	Study For 'interrupted Circle'
Medium	Pen and ink and collage
Size (H x W x D)	10.8 x 10 in / 27.5 x 25.5 cm
Signed	Yes
Stamped	No
Inscribed	No
Dating	N/A
Lot number	172
Auction time	13 December 2007
Auction house	Sothebys – United Kingdom: London, Bond Street
Estimated price	10,000 - 15,000 GBP
Auction result	16,100 GBP ≈ 17,843 EUR \| 26,380 USD
With premium	Yes
Edition	N/A
Foundry	N/A
Impression	N/A