Two Karel Appel paintings submitted separately for auction at Sotheby’s in Amsterdam each have part of a bigger drawing on their reverse side, news agency ANP reports on Friday.

The drawing of an animal is signed and dated 1950 but Appel obviously did not like it and cut the paper in two, ANP says.
Siebe Tettero, head of Sotheby’s modern art division, says the find is a ‘wonderful discovery made completely by chance’. Auction house workers noticed the drawings after taking the pictures out of their frames.
The guide price per picture is €40,000 and €60,000.