A Portrait by Leonardo? Scholars and Skeptics Differ.

A 19th-century German School portrait that sold for $21,850 at a Christie's auction in 1998 has now been attributed to Leonardo da Vinci by some art and scientific experts. A spokesman for the mixed-media portrait's Swiss owner, who wishes to remain anonymous, said offers to buy it have already started pouring in. He said the top bid so far was more than $50 million, by an intermediary acting on behalf of a Russian. [ABSTRACT FROM PUBLISHER]