Auction with a twist illustrates history of the corkscrew from three centuries

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These corkscrews are among 1,000 being sold by a private collector at Christie's in London on 6 May. They include a 1864 single-lever device patented by Charles Hull, estimate pounds 600- pounds 800 (second from left), and novelties such as the 19th-century woman's legs, estimate pounds 150- pounds 200