A rare six-litre bottle of 1947 French Cheval-Blanc white wine was sold to a private collector at $US304,375 ($A309,828), marking a world record price for a single bottle, Christie's said on Tuesday. ."We are absolutely thrilled with the result achieved by the bottle of the mythical Cheval-Blanc 1947 wine, which was sold for 304,375 US dollars against an estimate of 150,000 to 250,000 dollars to an anonymous collector," said Michael Ganne, an expert at the auctioneer's wine department. "Probably the only known existing 'imperial' of this wonderful Bordeaux, it sets a new world record price for a bottle of wine at auction," he added. An 'imperial' is a six-litre bottle.