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This cork-filled life preserver from the Titanic, which sunk in 1912, will be sold at auction house Christie's annual ocean liner sale in New York next Wednesday. The life preserver, one of only six known to exist, had been kept by a family in Nova Scotia since it was found -- allegedly by a farmer at the Halifax shoreline soon after the tragedy. Christie's expects it to go for 30,000 to 40,000 pounds ($59,000 to $79,000); the auction house sold another one last year in London for 61,000 pounds ($120,000).