I believe the newly found young Mona is on canvas while Davinci painted on wood.
But then....perhaps the new one is the real Davinci...wouldn't that be a .........
the Mona Lisa in the Louvre is the fake, lol. That’d be a kick in the pants wouldn’t it?
Can't remember the time-frame but Munch painted something like a half dozen or so "Screams". One of which, was displayed as "The Scream", and stolen again...
FWIW, the book is interspersed with a number of art theft stories, including the "Mona Lisa".
IIRC, its theft by a janitor was so that some con artist could sell fakes for big bucks to rich idiots. The painting's theft generated the needed publicity to con the buyers that each mark was getting the original. The crook also shafted the janitor, BTW, who eventually got off fairly easy, being an Italian "wishing to repatriate the art..."