George Washington's signature is in the top right hand corner of the book
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George Washington's copy of constitution sells for $10m

23 June 2012 Last updated at 09:12 BST

A book owned by George Washington, containing his own annotated copy of the constitution - has sold for nearly $10m at an auction in New York - more than three times what it was expected to fetch.

The new owner is the Mount Vernon Ladies' Association, which paid a final price of $9,826,500, Christie's later revealed.

Tim Allman reports.