SAN DIEGO -- Disputed art linked to Nelson Mandela is scheduled to go on display in a London gallery next week in advance of Mandela’s 91st birthday.

The exhibit is being called "Mandela at 91." It’s the same art the I-Team exposed as questionable in 2007 while it was for sale at a La Jolla Gallery.

Achmat Dangor, executive director of the Nelson Mandela Foundation, told the I-Team in July 2007, "I think it’s a terrible betrayal of a man like Nelson Mandela that someone would so unscrupulously want to exploit his image and dupe other people into buying fraudulent pieces of art."

Mandela’s attorney, Bally Chuene, said, “He (Mandela) did not sign those artworks… It is important to tell the public that they are being deceived."

Mandela, in conjunction with an artist, did create a limited series of artworks that were quickly purchased. The art depicted his 27 years as a political prisoner during Apartheid. But, Cheune said, unauthorized mass reproductions were made.

When the art appeared at the La Jolla Gallery the I-Team interviewed Benjamin Cook, the General Manager of the exhibit. He said that Mandela had signed all of the lithographs, 15,000 of them.

"It was a long and laborious process," Cook claimed.

But Dangor said Mandela only signed roughly 10 works of art and, he said, the exhibit in La Jolla was fraudulent. He also said it was not true that some of the proceeds of the art sales went to Mandela-supported charities.

Mandela’s attorney has sent a letter to the London gallery expecting to open the exhibit next week warning against trying to sell the controversial art.