A self-portrait by British artist Lucian Freud is expected to sell for millions, with estimates ranging from STG8 million to STG12 million ($A16 million to $A25 million).

The art and luxury auction house Christie's will offer three major works in its 20th/21st Century: London Evening Sale on October 15 , including Freud's Self-portrait Fragment.

Among the pieces going up for sale is Woman With A Tulip which is estimated to sell for between STG3 million and STG5 million, and Sleeping Head which is estimated at between STG2 million and STG3 million.

Katharine Arnold, vice-chairman and head of post-war and contemporary art at Christie's Europe, told the PA news agency: "They are historic. They're from the 1940s all the way through to the 1960s and they mark three distinct moments in the

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