London, UK. 22 February 2018. A technician views ''Étude Pour 'Gradiva''' by Salvador Dalí, (Est. £60,000 - 80,000) at the preview of Sotheby's upcoming Impressionist, Modern & Surrealist Art auctions taking place at Sotheby's, New Bond Street, on 28 February. Credit: Stephen Chung / Alamy Live News

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Photo credit: © Stephen Chung / Alamy / Afripics
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