The Mona Lisa is up for auction. Or is it?

Can you spot which one is a fake?

This is the 'Hekking Mona Lisa'

It was bought by Raymond Hekking in 1953

He spent decades claiming his Mona Lisa painting was the real thing

and the one in the Louvre Museum was a copy

Location: Paris, France

(SOUNDBITE) (English) CHRISTIE'S INTERNATIONAL DIRECTOR OF OLD MASTER PAINTING, PIERRE ETIENNE, SAYING:

"The main difference is probably is the image itself because it looks like the Mona Lisa but the quality of the execution is not Leonardo da Vinci. Unfortunately on that point the dream is a bit over."

Christie's is putting the 'Hekking Mona Lisa' up for sale

where it is expected to fetch over $240,000

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