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This large-scale Andy Warhol self-portrait, previously unknown to the wider public, and made available by Christie's auction house in London Tuesday Jan. 11, 2011, will be among the highlights of the auctioneer's contemporary art sale next month. The six foot square (half a square meter large) red-and-white painting is one of a well-known series of self-portraits executed by the Pop Art master in 1967. Christie's said Tuesday that five of the 11 works in the series are already in museums. The present work has been hidden away in a private collection since 1974 and is expected to fetch up to 5 million pounds ($7.75 million) when it goes on sale in London on Feb. 16. Warhol died in 1987 but remains one of the world's most expensive artists. The painting will go on public view in New York from Jan. 22 to Jan. 26. (AP Photo/Christie's Images) FOR ONE TIME USE ONLY IN CONNECTION WITH PREVIEW OR REVIEW OF THE RELEVANT AUCTION SALE: EDITORIAL USE ONLY: NO SALES: NO ARCHIVE:

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