The blue, white and celadon flask -- more than 200-years-old -- was bought by a French woman who outbid 17 Chinese buyers during a sale that lasted about ten-minutes, according to auctioneers who described the buy as "historic and legendary".
The final sale including fees totalled more than 5 million euros -- ten times the auction's opening price of 500,000 euros.
The round-shaped moon flask has eight Buddhist symbols in stylised lotus petals and bears the seal of the emperor. It was discovered by chance in April in a French castle during a valuation of antiques and its original owners remain anonymous.
The buyer, who bid over the phone during the auction at Artigny chateau in Montbazon, central France, s expected to keep the flask at her apartment in Paris but it could potentially be loaned to a museum in future, the auctioneer said.
The other flask was sold for 1.8 million euros at Sotheby's in Hong Kong in 2016.
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