The blue and white moon flask was auctioned Wednesday at Sotheby's sale of Chinese works of art. Its presale estimate was $600,000 to $900,000.
The piece had been in the same family collection for decades. The auction house said the family decided to sell it after seeing a similar piece in a Sotheby's advertisement.
They had the vase on a wooden stand that was used as a doorstop in their Long Island home.
The owner did not wish to be identified.
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