New Leonardo da Vinci picture discovered by a fingerprint

A previously unknown portrait by Leonardo da Vinci potentially worth tens of millions of pounds is thought to have been discovered thanks to a fingerprint.

The painting, titled Young Girl in Profile in Renaissance Dress, recently sold for a mere £12,000 ($19,000). It was billed at a Christie's sale in 1998 as "German, early 19th century".

Peter Silverman, the Canadian-born owner, thought there was more to it and decided to get the drawing checked out after buying it in 2007.

His hunch appears to have paid off.

A Paris laboratory discovered that a fingerprint from the tip of an index or middle-finger, found on the top left of the picture, was "highly comparable" to one found on da Vinci's work St Jerome, which he painted early in his career when he did not have assistants, according to the Antiques Trade Gazette.

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